Question

Read the following statements

(a) Carbohydrates synthesized in the leaves are translocated to other parts of the plant through Xylem.

(b) Recombinant DNA is also known as chimeric DNA.

(c) Programmed cell death is known as ‘apoptosis’.

1. (a) and (b) are correct
2. (b) and (c) are correct
3. Only (a) correct
4. All (a), (b), (c) are correct

Answer 1

Correct Answer - Option 2 : (b) and (c) are correct

The correct answer is (b) and (c) is correct.

• Carbohydrates synthesized in the leaves are translocated to other parts of the plant through phloem. Hence, statement A is incorrect.
  • Phloem is a conducting tissue. Its main function is to conduct foods prepared by the leaves to different parts of the plant.
  • Xylem is usually called wood. This is a conducting tissue.
  • Its two main functions are:
    • Conduction of water and minerals.
    • To provide mechanical consistency.
• Recombinant DNA:
  • These are molecules of DNA that are formed through genetic recombination methods.
  • It is also known as chimeric DNA. Hence, statement B is correct.
• The cells of a multicellular organism are members of a highly organized community.
• The number of cells in this community is tightly regulated not simply by controlling the rate of cell division, but also by controlling the rate of cell death.
• If cells are no longer needed, they commit suicide by activating an intracellular death function and this process is called programmed cell death and is more commonly called apoptosis. Hence, statement C is correct.