-
The kidneys in human are a part of the system for
(a) nutrition (b) respiration
(c) excretion (d) transportation
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The xylem in plants are responsible for
(a) transport of water (b) transport of food
(c) transport of amino acids (d) transport of oxygen
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The autotrophic mode of nutrition requires
(a) carbon dioxide and water
(b) chlorophyll
(c) sunlight
(d) all of these
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The breakdown of pyruvate to give carbon dioxide, water and energy takes place in
(a) cytoplasm (b) chloroplast
(c) mitochondria (d) nucleus
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How are fats digested in our bodies? Where does this process take place in?
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What is the role of saliva in the digestion of food?
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What are the necessary conditions for autotrophic nutrition and what are its by- products?
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What are the differences between aerobic and anaerobic respiration? Name some organisms that use the anaerobic mode of respiration?
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How are the alveoli designed to maximize the exchange of gases?
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Describe double circulation in human beings. Why is it necessary?
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What would be the consequences of a deficiency of haemoglobin in our body?
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What are the differences between the transport of materials in xylem and phloem?
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Compare the functioning of alveoli in the lungs and nephrons in the kidneys with respect to their structure and functioning.
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-
Why is diffusion insufficient to meet the oxygen requirements of multicellular organisms like humans?
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What criteria do we use to decide whether something is alive?
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What are outside raw materials used for by an organism?
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What process would you consider essential for maintaining life?
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What are the differences between autotrophic nutrition and heterotrophic nutrition?
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-
Where do plants get each of the raw materials required for photosynthesis?
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What is the role of the acid in our stomach?
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What is the function of digestive enzymes?
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How is the small intestine designed to absorb digested food?
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What advantages over an aquatic organism does a terrestrial organism have with regard to obtaining oxygen for respiration?
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What are the different ways in which glucose is oxidized to provide energy in various organisms?
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How is oxygen and carbon dioxide transported in human beings?
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How are the lungs designed in human beings to maximize the area for the exchange of gases?
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What are the components of transport system in human beings? What are the functions of these components?
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Why it is necessary to separate oxygenated and deoxygenated blood in mammals and birds?
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What are the components of transport system in highly organized plants?
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How are water and minerals transported in plants?
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-
How is food transported in plants?
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Describe the structure and functioning of nephrons.
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What are the methods used by plants to get rid of excretory products?
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How is the amount of urine produced is regulated?
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question_answer35)
Which of the
following statements about the autographs is incorrect?
(a) They
synthesise carbohydrates from carbon dioxide and water in the presence of
sunlight and chlorophyll
(b) They
store carbohydrates in the form of starch
(c) They
convert carbon dioxide and water into carbohydrates in the absence of sunlight
(d) They
constitute the first trophic level in food chains
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question_answer36)
In which of
the following groups of organisms, food material is broken down outside the
body and absorbed?
(a) Mushroom,
green plants, Amoeba (b) Yeast, mushroom, bread mould
(c) Paramecium,
Amoeba, Cuscuta (d) Cuscuta, lice, tapeworm
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question_answer37)
Select the
correct statement
(a)
Heterotrophs do not synthesize their own food
(b) Heterotrophs
utilize solar energy for photosynthesis
(c) Heterotrophs
synthesize their own food
(d) Heterotrophs
are capable of converting carbon dioxide and water into carbohydrates
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question_answer38)
Which is the
correct sequence of parts in human alimentary canal?
(a)
MouthStomachSmall intestineOesophagusLarge intestine
(b) Mouth OesophagusStomachLarge intestine Small intestine
(c)MouthStomachOesophagusSmall intestineLarge intestine
(d)MouthOesophagusStomachSmall intestineLarge intestine
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question_answer39)
If salivary amylase
is lacking in the saliva, which of the following events in the mouth cavity
will be affected?
(a) Proteins
breaking down into amino acids
(b) Starch
breaking down into sugars
(c) Fats
breaking down into fatty acids and glycerol
(d) Absorption
of vitamins
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question_answer40)
The inner
lining of stomach is protected by one of the following from hydrochloric acid.
Choose the correct one
(a)
Pepsin (b) Mucus (c)
Salivary amylase (d) Bile
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question_answer41)
Which part
of alimentary canal receives bile from the liver?
(a)
Stomach (b) Small intestine (c) Large
intestine (d) Oesophagus
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question_answer42)
A few drops
of iodine solution were added to rice water. The solution turned blue-black in colour.
This indicates that rice water contains
(a) complex
proteins (b) simple proteins (c) fats (d)
starch
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question_answer43)
In which
part of the alimentary canal food is finally digested?
(a)
Stomach (b) Mouth cavity (c) Large
intestine (d) Small intestine
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question_answer44)
Choose the function
of the pancreatic juice from the following
(a) Trypsin
digests proteins and lipase carbohydrates
(b) Trypsin
digests emulsified fats and lipase proteins
(c) Trypsin
and lipase digest fats
(d) Trypsin
digests proteins and lipase emulsified fats
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question_answer45)
When air is blown
from mouth into a test-tube containing lime water, the lime water turned milky
due to the presence of
(a) oxygen (b)
carbon dioxide (c) nitrogen (d) water vapour
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question_answer46)
The correct sequence
of anaerobic reactions in yeast is
(a) Glucose 
Pyruvate
Ethanol + Carbon
dioxide
(b) Glucose PyruvateLactic acid
(c) Glucose PyruvateLactic acid
(d) GlucosePyruvateEthanol + Carbon
dioxide
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question_answer47)
Which of the
following is most appropriate for aerobic respiration?
(a) GlucosePyruvate
Energy
(b) Glucose Pyruvate Energy
(c) Glucose Pyruvate + Energy
(d) GlucosePyruvate + EnergyEnergy
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question_answer48)
Which of the
following statements (s) is (are) true about respiration?
(i) During
inhalation, ribs move inward and diaphragm is raised
(ii) In the
alveoli, exchange of gases takes place, i.e., oxygen form alveolar air diffuses
into blood and carbon dioxide from blood into alveolar air
(iii) Haemoglobin
has greater affinity for carbon dioxide than oxygen
(iv) Alveoli
increases surface area for exchange of gases
(a) (i) and
(iv) (b) (ii) and (iii) (c) (i) and
(iii) (d) (ii) and (iv)
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question_answer49)
Which is the
correct sequence of air passage during inhalation?
(a) Nostrils
Larynx PharynxTrachea Lungs
(b) Nasal
passageTracheaPharynx Larynx Alveoli
(c) Larynx NostrilsPharynxLungs
(d) Nostrils
PharynxLarynx Trachea Alveoli
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question_answer50)
During respiration
exchange of gases take place in
(a) trachea
and larynx (b) alveoli of lungs (c) alveoli and throat (d)
throat and larynx
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question_answer51)
Which of the
following statement (s) is (are) true about heart?
(i) Left
atrium receives oxygenated blood from different parts of body while right
atrium receives deoxygenated blood from lungs
(ii) Left
ventricle pumps oxygenated blood to different body parts while right ventrivie
pumps deoxygenated blood to lungs
(iii) Left
atrium transfers oxygenated blood to right ventricle which sends it to
different body parts
(iv) Right
atrium receives deoxygenated blood from different parts of the body while left
ventricle pumps oxygenated blood to different parts of the body
(a)
(i) (b) (ii) (c)
(ii) and (iv) (d) (i) and (iii)
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question_answer52)
What prevents
backflow of blood inside the heart during contraction?
(a) Valves
in heart
(b) Thick
muscular walls of ventricles
(c) Thin
walls of atria
(d) All of
these
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question_answer53)
Single circulation, i.e.,
blood flows through the heart only once during one cycle of passage through the
body, is exhibited by
(a) Labeo,
Chameleon, Salamander
(b) Hippocampus,
Exocoetus, Anabas
(c) Hyla,
Rana, Draco
(d) whale,
dolphin, turtle
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question_answer54)
In which of
the following vertebrate group/groups, heart does not pump oxygenated blood to
different parts of the body?
(a) Pisces
and amphibians (b) Amphibians and
reptiles
(c) Amphibians
only (d) Pisces only
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question_answer55)
Choose the
correct statement that describes arteries,
(a) They
have thick elastic walls, blood flows under high pressure; collect blood from
different organs and bring it back to the heart
(b) They have
thin walls with valves inside, blood flows under low pressure and carry blood
away from the heart to various organs of the body
(c) They
have thick elastic walls, blood flows under low pressure carry blood from the
heart to various organs of the body
(d) They
have thick elastic wall's without valves inside, blood flows under high pressure
and carry blood away from the heart to different parts of the body.
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question_answer56)
The
filtration units of kidneys are called
(a) ureter (b)
urethra (c) neurons (d)
nephrons
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question_answer57)
Oxygen
liberated during photosynthesis comes from
(a)
water (b) chlorophyll (c) carbon
dioxide (d) glucose
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question_answer58)
The blood
leaving the tissues becomes richer in
(a) carbon
dioxide (b) water (c) heamoglobin (d)
oxygen
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question_answer59)
Which of the
following is an incorrect statement?
(a) Organisms
grow with time
(b) Organisms
must repair and maintain their structure
(c) Movement
of molecules does not take place among cells
(d) Energy
is essential for life processes
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question_answer60)
The internal
(cellular) energy reserve in autographs is
(a) glycogen (b)
protein (c) starch (d)
fatty acid
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question_answer61)
Which of the
following equations is the summary of photosynthesis?
(a)
(b)
(c)
(d)
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question_answer62)
Choose the event
that does not occur in photosynthesis.
(a) Absorption
of light energy by chlorophyll (b) Reduction of carbon dioxide to
carbohydrates
(c) Oxidation
of carbon to carbon dioxide (d) Conversion of light energy to
chemical energy
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question_answer63)
The opening and
closing of the stomatal pore depends upon
(a) oxygen (b)
temperature
(c) water in
guard cells (d) concentration
of CO2 in stomata
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question_answer64)
Choose the
forms in which most plants absorb nitrogen
(i)
Proteins
(ii)
Nitrates and Nitrites
(iii)
Urea
(iv)
Atmospheric nitrogen
(a) (i) and
(ii) (b) (ii) and (iii) (c) (iii) and
(iv) (d) (i) and (iv)
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question_answer65)
Which is the first
enzyme to mix with food in the digestive tract?
(a)
Pepsin (b) Cellulase (c)
Amylase (d) Trypsin
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question_answer66)
Which of the
following statements (s) is (are) correct?
(i) Pyruvate
can be converted into ethanol and carbon dioxide by yeast
(ii) Fermentation
takes place in aerobic bacteria
(iii) Fermentation
takes place in mitochondria
(iv) Fermentation
is a form of anaerobic respiration
(a) (i) and
(iii) (b) (ii) and (iv) (c) (i) and
(iv) (d) (ii) and (iii)
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question_answer67)
Break down of
pyruvate using oxygen, i.e., aerobic respiration takes place in the mitochondria.
Lack of
oxygen in muscles often leads to cramps among cricketers. This results due to
(a) conversion
of pyruvate to ethanol (b) conversion of pyruvate to glucose
(c) non-conversion
of glucose to pyruvate (d) conversion of pyruvate to lactic acid
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question_answer68)
Choose the
correct path of urine in our body
(a) Kidney Ureters Urethra Urinary bladder
(b) KidneysUrinary bladder Urethra Ureter
(c) KidneyUretersUrinary bladder Urethra
(d) UrinaryBladderKidneyUreter Urethra
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question_answer69)
During
deficiency of oxygen in tissues of human beings, pyruvic acid is converted into
lactic acid in the
(a)
cytoplasm (b) chloroplast (c) mitochondria (d)
Golgi body
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question_answer70)
Name the following
(a) The
process in plants that links light energy with chemical energy.
(b) Organisms
that can prepare their own food.
(c) The cell
organelle where photosynthesis occurs.
(d) Cells
that surround a stomatal pore.
(e) Organisms
that cannot prepare their own food
(f) An
enzyme secreted from gastric glands in stomach that acts on proteins.
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question_answer71)
"All
plants give out oxygen during day and carbon dioxide during night".
Do you agree
with this statement? Give reason.
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question_answer72)
How do the
guard cells regulate opening and closing of stomatal pores?
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question_answer73)
Two green
plants are kept separately in oxygen free containers, one in the dark and the
other in continuous light. Which one will live longer? Give reasons.
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question_answer74)
If a plant is
releasing carbon dioxide and taking in oxygen during the day, does it mean that
there is no photosynthesis occurring? Justify your answer.
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question_answer75)
Why do
fishes die when taken out of water?
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question_answer76)
Differentiate
between an autotroph and a heterotroph.
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question_answer77)
Is
'nutrition' a necessity for an organism? Discuss.
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question_answer78)
What would
happen if green plants disappear from earth?
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question_answer79)
Leaves of a healthy
potted plant were coated with Vaseline- Will this plant remain healthy for
long? Give reasons for your answer.
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question_answer80)
How does
aerobic respiration differ from anaerobic respiration?
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question_answer81)
Match the
words of column I with that of column II.
Column I Column II
A.
Phloem Excretion
B.
Nephron Translocation of food
C.
Veins Clotting of blood
D.
Platelets Deoxygenated blood
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question_answer82)
Differentiate
between an artery and a vein.
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question_answer83)
What are the
adaptations of leaf for photosynthesis?
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question_answer84)
Why is small
intestine in herbivores longer than in carnivores?
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question_answer85)
What will happen if
mucus is not secreted by the gastric glands?
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question_answer86)
What is the
significance of emulsification of fats?
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question_answer87)
What causes
movement of food inside the alimentary canal?
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question_answer88)
Why does absorption
of digested food occur mainly in the small intestine?
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question_answer89)
Match the
following columns.
Column
I Column II
A.
Autotrophic nutrition Leech
B. Heterotrophic
nutrition Paramecium
C. Parasitic
nutrition Deer
D.
Digestion in food vacuoles Green plant
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question_answer90)
Why is the
rate of breathing in aquatic organisms much faster than in terrestrial
organisms?
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question_answer91)
Why is blood
circulation in human heart called double circulation?
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question_answer92)
What is the
advantage of having four chambered heart?
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question_answer93)
Mention the
major events during photosynthesis.
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question_answer94)
In each of
the following situations what happens to the rate of photosynthesis?
(a) Cloudy
days
(b) No
rainfall in the area
(c) Good managing
in the area
(d) Stomata
get blocked due to dust
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question_answer95)
Name the
energy currency in the living organisms. When and where is it produced?
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question_answer96)
What is
common for Cuscuta, ticks and leeches?
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question_answer97)
Explain the
role of mouth in digestion of food.
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question_answer98)
What are the
functions of gastric glands present in the wall of the stomach?
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question_answer99)
Match the terms
in column I with those in column II.
Column I Column
II
A.
Trypsin Pancreas
B.
Amylase Liver
C.
Bile Gastric glands
D.
Pepsin Saliva
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question_answer100)
Name the
correct substrates for the following enzymes
(a) Trypsin
(b) Amylase
(c)
Pepsin (d) Lipase
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question_answer101)
Why do veins
have thin walls as compared to arteries?
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question_answer102)
What will
happen if platelets were absent in the blood?
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question_answer103)
Plants have low
energy needs as compared to animals. Explain.
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question_answer104)
Why and how
does water enter continuously into the root xylem?
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question_answer105)
Why is
transpiration important for plants?
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question_answer106)
How do
leaves of plants help in excretion?
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question_answer107)
Explain the process
of nutrition in Amoeba.
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question_answer108)
Describe the
alimentary canal of man.
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question_answer109)
Explain the process
of breathing in man.
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question_answer110)
Explain the
importance of soil for plant growth.
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question_answer111)
Draw the
diagram of alimentary canal of man and label the following parts.
Mouth,
Oesophagus, Stomach, Intestine
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question_answer112)
How do
carbohydrates, proteins and fats get digested in human beings?
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question_answer113)
Explain the
mechanism of photosynthesis.
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question_answer114)
Explain the
three pathways of breakdown in living organisms.
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question_answer115)
Describe the
flow of blood through the heart of human beings.
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question_answer116)
Describe the process
of urine formation in kidneys.
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