Identify the correct statement with regard to G₁ phase (Gap 1) of interphase.

NEET-(Sept)2020 [Cell-Cycle-and-Cell-Division] [class-xi ]

• DNA synthesis or replication takes place.
• Reorganisation of all cell components takes place.
• Cell is metabolically active, grows but does not replicate its DNA.
• Nuclear Division takes place.
Correct Option: C  [ Cell is metabolically active, grows but does not replicate its DNA. ]

Remark:

Dissolution of the synaptonemal complex occurs during:

NEET-(Sept)2020 [Cell-Cycle-and-Cell-Division] [class-xi ]

• Pachytene
• Zygotene
• Diplotene
• Leptotene
Correct Option: C  [ Diplotene ]

Remark:

Match the following with respect to meiosis :

NEET-(Sept)2020 [Cell-Cycle-and-Cell-Division] [class-xi ]

• (A)-(III), (B)-(IV), (C)-(I), (D)-(II)
• (A)-(IV), (B)-(III), (C)-(II), (D)-(I)
• (A)-(I), (B)-(II), (C)-(IV), (D)-(III)
• (A)-(II), (B)-(IV), (C)-(III), (D)-(I)
Correct Option: B  [ (A)-(IV), (B)-(III), (C)-(II), (D)-(I) ]

Remark:

The process responsible for facilitating loss of water in liquid form from the tip of grass blades at night and in early morning is:

NEET-(Sept)2020 [Transport-in-Plants] [class-xi ]

• Transpiration
• Root pressure
• Imbibition
• Plasmolysis
Correct Option: B  [ Root pressure ]

Remark:

Match the following concerning essential elements and their functions in plants:

NEET-(Sept)2020 [Mineral-Nutrition] [class-xi ]

• (A)-(II), (B)-(I), (C)-(IV), (D)-(III)
• (A)-(IV), (B)-(III), (C)-(II), (D)-(I)
• (A)-(III), (B)-(IV), (C)-(II), (D)-(I)
• (A)-(IV), (B)-(I), (C)-(II), (III)
Correct Option: C  [ (A)-(III), (B)-(IV), (C)-(II), (D)-(I) ]

Remark:

The product(s) of reaction catalyzed by nitrogenase in root nodules of leguminous plants is/are:

NEET-(Sept)2020 [Mineral-Nutrition] [class-xi ]

• Ammonia alone
• Nitrate alone
• Ammonia and oxygen
• Ammonia and hydrogen
Correct Option: D  [ Ammonia and hydrogen ]

Remark:

In light reaction, plastoquinone facilitates the transfer of electrons from:

NEET-(Sept)2020 [Photosynthesis-in-Higher-Plants] [class-xi ]

• PS-II to Cytb₆f complex
• Cytb₆f complex to PS-I
• PS-I to NADP⁺
• PS-I to ATP synthase
Correct Option: A  [ PS-II to Cytb₆f complex ]

Remark:

The oxygenation activity of RuBisCo enzyme in photorespiration leads to the formation of:

NEET-(Sept)2020 [Photosynthesis-in-Higher-Plants] [class-xi ]

• 2 molecules of 3-C compound
• 1 molecule of 3-C compound
• 1 molecule of 6-C compound
• 1 molecule of 4-C compound and 1 molecule of 2-C compound
Correct Option: B  [ 1 molecule of 3-C compound ]

Remark:

The number of substrate level phosphorylations in one turn of citric acid cycle is:

NEET-(Sept)2020 [Respiration-in-Plants] [class-xi ]

• Zero
• One
• Two
• Three
Correct Option: B  [ One ]

Remark:

Which of the following is not an inhibitory substance governing seed dormancy?

NEET-(Sept)2020 [Plant-Growth-and-Development] [class-xi ]

• Gibberellic acid
• Abscisic acid
• Phenolic acid
• Para-ascorbic acid
Correct Option: A  [ Gibberellic acid ]

Remark: