The structures that are formed by stacking of organised flattened membranous sacs in the chloroplasts are

1.	cristae	2.	grana
3.	stroma lamellae	4.	stroma

Anoxygenic photosynthesis is characteristic of
1. Rhodospirillum
2. Spirogyra
3. Chlamydomonas
4. Ulva

The correct sequence of cell organelles during photorespiration is
1. chloroplast-golgi bodies-mitochondria
2. chloroplast-rough endoplasmic reticulum-dictyosomes
3. chloroplast-peroxisome-mitochondria
4. chloroplast-vacuole-peroxisome

PGA, as the first ${\mathrm{CO}}_2$ fixation product, was discovered in photosynthesis of
1. bryophyte
2. gymnosperm
3. angiosperm
4. alga

${\mathrm{C}}_4$ -plants are photosynthetically more efficient than ${\mathrm{C}}_3$ -plants because
1. ${\mathrm{CO}}_2$ compensation point is more.
2. ${\mathrm{CO}}_2$ generated during photorespiration is trapped and recycled through PEP carboxylase.
3. ${\mathrm{CO}}_2$ efflux is not prevented.
4. they have more chloroplasts.

In the leaves of ${\mathrm{C}}_4$ -plants, malic acid synthesis during ${\mathrm{CO}}_2$ fixation occurs in
1. epidermal cells
2. mesophyll cells
3. bundle sheath
4. guard cells

Carbohydrates are commonly found as starch in plant storage organs. Which of the following five properties of starch (A-E) make it useful as a storage material?
A. Easily translocated
B. Chemically non-reactive
C. Easily digested by animals
D. Osmotically inactive
E. Synthesized during photosynthesis
The useful properties are
1. (B) and (C)
2. (B) and (D)
3. (A), (C) and (E)
4. (A) and (E)

The first acceptor of electrons from an excited chlorophyll molecule of photosystem II is :

In photosystem-I, the first electron acceptor is :

During photorespiration, the oxygen consuming reaction(s) occur in :
1. stroma of chloroplasts and mitochondria
2. stroma of chloroplasts and peroxisomes
3. grana of chloroplasts and peroxisomes
4. stroma of chloroplasts