NEET Botany 2

Question 1

Which plant hormone is responsible for apical dominance?

Accepted Answer

Auxin

Answer

Auxin produced at the apical bud suppresses the growth of lateral buds, a phenomenon called apical dominance.

Question 2

The fluid-mosaic model of plasma membrane was proposed by:

Accepted Answer

Singer and Nicolson

Answer

Singer and Nicolson proposed the fluid-mosaic model in 1972, describing the membrane as a fluid phospholipid bilayer with embedded proteins.

Question 3

Kranz anatomy is typically found in plants that perform:

Accepted Answer

C4 photosynthesis

Answer

Kranz anatomy, with bundle sheath cells surrounding mesophyll cells, is characteristic of C4 plants like maize and sugarcane.

Question 4

Which of the following is NOT a characteristic of gymnosperms?

Accepted Answer

Double fertilization

Answer

Double fertilization is a characteristic of angiosperms, not gymnosperms; gymnosperms have simple fertilization.

Question 5

The enzyme RuBisCO catalyzes which step in the Calvin cycle?

Accepted Answer

Carboxylation of RuBP

Answer

RuBisCO (ribulose bisphosphate carboxylase/oxygenase) catalyzes the fixation of CO2 by adding it to RuBP to form two molecules of 3-PGA.

NEET - National Eligibility cum Entrance Test Practice Test