NEET Biology Respiration in Plants Question Bank

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NEET Biology Respiration in Plants Question Bank

·        1) During injury and infection, the rate of

O2

consumption

A) Increases

B) Decreases

C) Remains unchanged

D) Becomes zero

·        2) The potato growing in hilly areas is bigger in size due to

A) High rate of photosynthesis at high altitude

B) Low rate of respiration at high altitude

C) Due to formation of more fat

D) None of the above

·        3) In presence of dilule salt solution, rate of respiration in a respiring tissue

A) Increases

B) Decreases

C) Remains constant

D) None of the above

·        4) If oxygen contents is reduced to 1%, the rate of respiration becomes

A) Optimum

B) Minimum

C) Maximum

D) None of the above

·        5) 

CO2

concentration has which relation with respiration

A) Directly proportional

B) Inversely proportional

C) Both [a] and [b]

D) No relation

·        6) If the nacked pea seeds are kept in four respiratory flasks, they would germinate best in the flask which contains [BHU 1982]

A) Carbon dioxide

B) Oxygen

C) Hydrogen

D) Nitrogen

·        7) Which of the following is necessary for respiration in plants [CPMT 1986]

A) Carbon dioxide

B) Oxygen

C) Chlorophyll

D) Light

·        8) The rate of respiration of young maturing seeds is quite high but as water contents decreases during further maturation, respiration [DPMT 1986]

A) Remains high

B) Stops completely

C) Increases steadily

D) Decreases steadily

·        9) In presence of cyanide, azide and carbon monoxide, the rate of respiration [MP PMT 1988]

A) Decreases

B) Increases

C) Remains the same

D) None of the above

·        10) Which statement is wrong [CBSE PMT 1989]

A) Stomatal opening is influenced by many factors and potassium

B) All enzymes are proteins, but all proteins are not enzymes

C) All angiosperms are with seeds, but all seed plants are not angiosperms

D) Factors which effect the respiration influence the photosynthesis, but reverse is not possible

·        11) If the temperature is increased (above

35oC

) [CPMT 1991]

A) Rate of decline of respiration will be earlier than decline of photosynthesis

B) Rate of decline of photosynthesis will be earlier than decline of respiration

C) Both decline simultaneously

D) Both do not show any fixed pattern

·        12) When an unripe banana is sealed in a polythene bag, it remains green for many days. But if an apple is also sealed in the same bag, the banana ripens and turns yellow within a few days. The reason is that apple [BHU 1994]

A) Removes

O2

released by the banana and thus promotes ripening

B) Produces

CO2

which promotes ripening

C) Removes

CO2

which inhibits ripening

D) Releases ethylene which promotes ripening

·        13) The graph shows the relation between light intensity and the giving off and taking up of carbon dioxide by the leaves of a plant. Why is most carbon dioxide given off when the light intensity is zero units [Kerala PMT 2004] 

A) Because it is just the start of the experiment

B) Only respiration is taking place at this intensity of light

C) Only photosynthesis is taking place at this intensity of light

D) The rate of photosynthesis is equivalent to the rate of respiration

E) The rate of photosynthesis is more than the rate of respiration