Free Photosynthesis In Higher Plants (Weekly Quiz: 4) NEET Biology Questions & Answers with Detailed Explanation & Full Review

Question-1

The reactions of Calvin cycle not directly dependent on light, but they usually do not occur at night. Why?

(a) $CO_{2}$ concentration in night is too high for these reactions to occur.

(b) Night is often too cold for these reactions to occur.

(c) Plants usually open their stomata at night.

(d) Calvin cycle is dependent on the products of light reaction.

Question-2

Suspension of isolated thylakoids in culture medium containing $CO_{2}$ and $H_{2}$O does not produce hexose due to absence of

(a) Enzyme

(b) ATP

(c) Proteins

(d) Hill reagent

Question-3

In photosynthesis, protons accumulate in the

(a) matrix of mitochondria.

(b) inner membrane space of mitochondria.

(c) lumen of thylakoid.

(d) stroma of thylakoid.

Question-4

If you consider the combined processes of photosynthesis and cellular respiration, the electrons found in $H_{2}O$ at the beginning of the light reactions end up attaching to _______during respiration.

(a) NADPH to make new glucose molecule.

(b) $O_{2}$ to make new $H_{2}$O molecule.

(c) pyruvate to make ethanol.

(d) electron transport carriers to make $O_{2}$.

Question-5

Kranz anatomy is one of the characteristics of the leaves of

(a) potato

(b) sugarcane

(c) wheat

(d) mustard.

Question-6

The chief pigment associated with photosynthesis is

(a) Chlorophyll a

(b) Chlorophyll b

(c) Xanthophyll

(d) Carotenoid

Question-7

The core metal of chlorophyll is

(a) Ni

(b) Fe

(c) Cu

(d) Mg.

Question-8

In photosynthesis energy from light reaction to dark reaction is transferred in the form of

(a) ADP

(b) RuDP

(c) ATP

(d) chlorophyll.

Question-9

Photolysis of each water molecule in light reaction will yield

(a) 4 electrons and 3 protons

(b) 2 electrons and 4 protons

(c) 4 electrons and 3 protons

(d) 2 electrons and 2 protons

Question-10

Which of the following is incorrect about cyclic photophosphorylation?

(a) It occurs only when light of wavelength beyond 680 nm is available for excitation.

(b) Only PS I is involved.

(c) Only synthesis of ATP occurs.

(d) Synthesis of NADPH + $H^{+}$ occurs.