ETC

Q. In photosynthesis, during the operation of $LHCII$, the excited $P-680$ is rapidly photo oxidized as it passes electrons to

1. ferredoxin
2. pheophytin
3. $Fe-S$ protein
4. $CoQ$

Q.

Explain ETS.

Q. Which of the following statements regarding photorespiration are true?

1. Photorespiration is a metabolically expensive pathway
2. Photorespiration is avoided when CO${}_2$ is abundant
3. Photorespiration results in loss of usable carbon dioxide
4. All of the above

Q.

How many ATP does cyclic Photophosphorylation produce?

Q.

what are cytochromes

Q. Which one of the following statements correctly describes cyclic photophosphorylation?

1. Water is the ultimate source of e- in cyclic phosphorylation
2. Cyclic photophosphorylation involves both PS-I and PS-II
3. Cyclic photophosphorylation produces neither ATP nor $NADPH+H^{+}$
4. There is cyclic flow of electrons

Q.

Where does non-cyclic Photophosphorylation occur?

Q.

Electron Transport System (ETS) is located in mitochondrial
(a) outer membrane
(b) inter membrane space
(c) inner membrane
(d) matrix

Q.

What is the end product of ETC?

Q.

Cyclic photophosphorylation produces

1. ATP + NADPH + O_2​

2. ATP

3. NADPH

4. ATP + NADPH

Q. ________ is the process of synthesis of ATP from ADP and inorganic phosphate in the presence of light.

1. Oxidative phosphorylation
2. Both a and b
3. Phosphorylation
4. Photophosphorylation

Q. Which of the following represents a correct ordering of the events that occur in the catabolism of glucose in the absence of $O_2$?

1. Glycolysis; oxidative phosphorylation
2. Oxidative phosphorylation; TCA cycle
3. TCA cycle; glycolysis
4. Glycolysis; fermentation

Q.

What is the purpose of cyclic Photophosphorylation?

Q.

In a plant cell, where are the ATP synthase complexes located?

1. inner mitochondrial membrane

2. A and C

3. thylakoid membrane

4. plasma membrane

Q. The image given below is the representation of:

1. Non-cyclic photophosphorylation occurring in the membrane system of chloroplast
2. Cyclic photophosphorylation occurring in the stroma
3. Cyclic photophosphorylation occurring in the stroma thylakoid membrane
4. None of these

Q. Genetically dwarf plants can be made tall by

1. GA
2. ABA
3. IAA
4. CK

Q.

Which statement describes the functioning of photosystem II?

1. The P680 chlorophyll donates a pair of protons to NADPH, which is thus converted to NADP+

2. The excitation is passed along to a molecule of P700 chlorophyll in the photosynthetic unit.

3. Light energy excites electrons in the electron transport chain in a photosynthetic unit.

4. The electron vacancies in P680 are filled by electrons derived from water.

Q.

Is oxidative phosphorylation the same as aerobic respiration?

Q.

Why is the ETC important?

Q.

Chlorophylls absorb mainly violet-blue and red region of light

1. True
2. False

Q.

How much ATP does cyclic photophosphorylation produce?

Q. Which among the following is a wrong statement?

1. Active transport proteins are sensitive to inhibitors
2. In an antiport two types of molecules cross the membrane in opposite directions.
3. Active transport proteins are not under hormonal regulation
4. Porins are proteins that form pores in the outer membrane of plastids and mitochondria, allowing molecules up to the size of small proteins.

Q. How is the loss of electrons from PS-ll compensated?

1. Electrons released by PS-l
2. Electrons released from FNR
3. Electrons released during photolysis of water
4. Electrons released from plastocyanin

Q. In the diagram given figure of Lac operon

1. i - Repressor, z - $\beta$-galactosidase, y - Permease, a - Transacetylase
2. i - Inhibitor, z - Repressor, y - Transacetylase, a - Permease
3. i - Inducer, z - $\beta$-galactosidase, y - Permease, a - Repressor
4. i -$\beta$-galactosidase, z - Repressor, y - Permease, a - Transacetylase

Q. Observe the image given below and select the right option.

1. A - Photosystem - I,
   D - Photosystem - II
2. A - ATP synthase, C - Cyclic ETC
3. A - PQ, B - Photosystem - II,
   D - F0-F1 particle
4. A - Cyt b6f, C - Cyclic ETC,
   D - Photosystem – I

Q. Identify the incorrect match.

1. Regeneration of PEP – Mesophyll cells
2. RuBP oxygenase activity – Chloroplast
3. Photorespiratory loss of CO${}_2$ – Cytoplasm
4. Decarboxylation in C${}_4$ pathway – Bundle sheath cell

Q.

What Is the process called when ATP Is synthesized by cells?

Q. In photosynthesis, during the operation of $LHCII$, the excited $P-680$ is rapidly photo oxidized as it passes electrons to

1. ferredoxin
2. pheophytin
3. $Fe-S$ protein
4. $CoQ$

Q. A plant heterozygous for tallness produces both tall and dwarf plants on self-pollination. This proves

1. Principle of dominance
2. Principle of incomplete dominance
3. Law of segregation
4. Law of independent assortment

Q.

Mention any one role of chlorine in plant cells?