Respiration in Plants Test

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Respiration in Plants Test - 5

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Question 1
1 / -0

Glycolysis occurs in

A
Mitochondria

B
Cell membrane

C
Chloroplast

D
Cytoplasm

Solution

Glycolysis" means the splitting of glucose. The first step of the process occurs in the cytoplasm of the cell and yields a small amount of energy (measured in units of ATP) and two molecules of pyruvate.
The other steps occur in the mitochondria.
It is an ongoing process as your cells have a constant need for energy
Question 2
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Which of the following reactions are catalysed by the enzyme phosphofructokinase?

A
Fructose - 1, 6 - bisphophate Fructose - 6 - phosphate

B
Glucose - 6 - phosphate Fructose - 6 - phosphate

C
G - 3 - P Dihydroxy acetone phosphate

D
Fructose - 6 - phosphate + ATP Fructose - 1, 6 - bisphosphate
Question 3
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Name the process complementary to respiration in plants.

A
Circulation

B
Photosynthesis

C
Osmoregulation

D
None of these
Question 4
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RQ (Respiratory Quotient) is infinite

A
if respiratory substrate is carbohydrate

B
if respiratory substrate is fat

C
if respiratory substrate is an organic acid

D
in anaerobic respiration
Question 5
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Which of the following statements are correct?

(A) The oxidation of pyruvic acid molecules formed in glycolysis occurs inside the mitochondria.
(B) Acetyl COA is a 3-carbon compound.
(C) Under anaerobic conditions, the pyruvic acid formed during glycolysis is reduced to either ethyl alcohol or lactic acid.
(D) Acetyl COA molecules enter into cyclic reactions during Calvin's cycle.

A
(A) and (B)

B
(C) and (D)

C
(A) and (C)

D
(B) and (C)
Question 6
1 / -0

In plants, the gaseous exchange take place in a) Stomata b) Roots c) Stems d) Lenticles

A
a) and b)

B
a) and d)

C
b) and d)

D
b) and c)

Solution

Plants unlike animals have no special systems for breathing or gaseous exchange. Stomata and lenticels allow gaseous exchange by diffusion.
Question 7
1 / -0

ADP ATP reaction occurs when two protons (H⁺) are passed from

A
thylakoid to cytosol

B
thylakoid to lumen

C
lumen of thylakoid to stroma

D
stroma to thylakoid lumen
Question 8
1 / -0

Organism which depend on dead and decaying organic matter is

A
herbivorous

B
saprophytes

C
carnivores

D
autotrophs

Solution

A saprophyte or saprotroph is an organism which gets its energy from dead and decaying organic matter. This may be decaying pieces of plants or animals.
This means that saprophytes are heterotrophs. They are consumers in the food chain.
Question 9
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The "energy currency" of plants and animals is

A
chlorophyll

B
calorie

C
ATP

D
NADP
Question 10
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If the CO₂ content of atmosphere is as high as 300 parts per million, then

A
all plants would be killed

B
growth of plants would get stunted

C
the plants would thrive well

D
plants would grow for sometime and then die
Question 11
1 / -0

Water potential in a leaf tissue is 'positive' (near zero) during

A
low transpiration

B
excessive absorption

C
excessive transpiration

D
guttation
Question 12
1 / -0

Kranz anatomy is typical of

A
C₄ plants

B
C₃ plants

C
C₂ plants

D
CAM plants
Question 13
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Which of the following statements are associated with the process of photorespiration in plants?

(A) Photorespiration takes place in only C3 plants.
(B) Photorespiration takes place in only C4 plants.
(C) Photorespiration takes place in both C3 and C4 plants.
(D) Glycolate is oxidised to glyoxylate in the peroxisome.
(E) Glycolate is oxidised to glyoxylate in the mitochondria.

A
(A) and (D)

B
(C) and (D)

C
(B) and (E)

D
(C) and (E)

E
None of these
Question 14
1 / -0

The end products of respiration in plants are

A
starch and O₂

B
H₂O and energy

C
CO₂, H₂O and energy

D
sugar and O₂
Question 15
1 / -0

Pasture effect can be studied in case of

A
Sccharomyces

B
Nostoc

C
Pinnularia

D
Pencillium

Solution

Reduction in consumption of respiratory substrate when the mode of respiration is changed from aerobic to anaerobic is called pasture effect. It is studied in case of Sccharmomyces.
Question 16
1 / -0

The enzyme fumarase catalyses the reaction

A
succinic acid fumartic acid

B
fumaric acid malic acid

C
malic acid oxaloacetic acid

D
succinyl COA succinic acid
Question 17
1 / -0

The splitting of a 6-carbon glucose molecule into molecules with 2-3 carbons called pyruvic acid takes place during

A
EMP pathway

B
Krebs' cycle

C
Calvin's cycle

D
Sigmoid curve
Question 18
1 / -0

When yeast ferments glucose, the products are

A
water and carbon dioxide

B
methanol and CO₂

C
ethanol and carbon dioxide

D
ethanol and water
Question 19
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During Krebs cycle, ______ molecules of ATP are released.

A
38

B
24

C
10

D
36
Question 20
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Respiration is

A
Anabolic process

B
Catabolic process

C
Amphibolic process

D
Both anabolic and catabolic

Solution

Catabolism is process of break down of any large substance into smaller ones. In respiration, glucose is broken down into carbon dioxide and water molecules. Thus it is referred to as a catabolic reaction