NEET Botany MCQs

Dissolution of the synaptonemal complex occurs during:

• Pachytene
• Zygotene
• Diplotene
• Leptotene

Match the following with respect to meiosis : <table> <tr> <td>(A)Zygotene</td> <td>(I)Terminalization</td> </tr> <tr> <td>(B)Pachytene</td> <td>(II)Chiasmata</td> </tr> <tr> <td>(C)Diplotene</td> <td>(III)Crossing over</td> </tr> <tr> <td>(D)Diakinesis</td> <td>(IV)Synapsis</td> </tr> </table> Select the correct option from the following :

• (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)

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

• Transpiration
• Root pressure
• Imbibition
• Plasmolysis

Select the incorrect statement.

• Transport of molecules in phloem can be bidirectional.
• Movement of minerals in xylem is unidirectional.
• Unloading of sucrose at sink does not involve the utilization of ATP.
• Elements most easily mobilized in plants from one region to another are: phosphorus, sulphur, nitrogen and potassium.

Match the following concerning essential elements and their functions in plants: <table> <tr> <td>(A)Iron</td> <td>(I)Photolysis of water</td> </tr> <tr> <td>(B)Zinc</td> <td>(II)Pollen germination</td> </tr> <tr> <td>(C)Boron</td> <td>(III)Required for chlorophyll biosynthesis</td> </tr> <tr> <td>(D)Manganese</td> <td>(IV)IAA biosynthesis</td> </tr> </table> Select the correct option:

• (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)

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

• Ammonia alone
• Nitrate alone
• Ammonia and oxygen
• Ammonia and hydrogen

In Glycine max, the product of biological nitrogen fixation is transported from the root nodules to other parts as:

• Ammonia
• Glutamate
• Nitrates
• Ureides

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

• PS-II to Cytb₆f complex
• Cytb₆f complex to PS-I
• PS-I to NADP⁺
• PS-I to ATP synthase

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

• 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

Which of the following statements is incorrect?

• RuBisCO is a bifunctional enzyme
• In C₄ plants, the site of RuBisCO activity is mesophyll cell
• The substrate molecule for RuBisCO activity is a 5-carbon compound
• RuBisCO action requires ATP and NADPH