Which of the following statements is correct regarding short day plants (SDPs)?

• They can flower in complete darkness if supplied with exogenous nutrients.

• They are the same as long day plants.

• They do not have a critical photoperiod

• All of these.

Photosynthetic bacteria do not contain

• quantasome

• PS- I and PS- II

• PS-II

• PS-I

Assertion : Stomata remain open during day.

Reason : Stomata help in exchange of gases.

• If both Assertion and Reason are true and Reason is the correct explantion of Assertion

• If both Assertion and Reason are true and Reason is not the correct explanation of Assertion

• If Assertion is true but Reason is false

• If Assertion is false but Reason is true.

Which of the following statements regarding cyclic flow of electrons during light reactions is false?

• This process takes place in the stromal lamella

• ATP synthesis takes place

• NADPH + H⁺ is synthesized

• Takes place only when light of wavelength beyond 680 nm is available for excitation

• Takes place only when light of wavelength beyond 680 nm is available for excitation

Find out the mismatched pair

• C₄ plants - Kranz anatomy

• Primary CO₂ fixation product of C₄ plants - OAA

• Primary CO₂ acceptor of C₃  plants - RuBP

• Calvin pathway of C₄ plants occur in  - Bundle sheath 

• Calvin pathway of C₄ plants occur in  - Bundle sheath 

3-phosphoglyceric acid (PGA) as the first CO₂ fixation product in algal photosynthesis was discovered by 

• Joseph Priestley

• Jan Ingenhousz

• T.W. Engelmann

• Julius von Sachs

• Julius von Sachs

Match the following

Column I	Column II
A. Chlorophyll a	1. yellow
B. Chlorophyll b	2. bright or blue green
C. Xanthophyll	3. yellow - yellow orange
D. Carotenoids	4. yellow green

• A - 2; B - 4; C - 1; D - 3

• A - 3; B - 4; C - 2; D - 1

• A - 4; B - 3; C - 2; D - 1

• A - 4; B - 2; C - 1; D - 3

• A - 4; B - 2; C - 1; D - 3

Maximum absorption of light by chlorophyll a occurs in which regions of the absorption spectrum?

(A) blue             

(B) red

(C) green

(D) yellow

• (A) and (B) only

• (B) and (C) only

• (A) and (D) only

• (B) and (D) only

• (B) and (D) only

Cyclic-photophosphorylation results in the formation of

• NADPH + H⁺

• ATP and NADPH + H⁺

• ADP

• ATP

• ATP

290.

Splitting of water molecues during the light reaction of photosynthesis is associated  with

(a) PSI resulting in the release of O₂, Protons and transfer of electrons of PS II.

(b) PSII resulting in the release of O₂, Protons and transfer of electrons of PS I.

(c) PSII resulting in the release of O₂, Protons and transfer of electrons of PS II.

(d) PSI resulting in the release of O₂, Protons and transfer of electrons of PS I.

• (a) alone is correct

• (b) alone is correct

• (c) alone is correct

• (d) alone is correct

• (d) alone is correct