Cell cycle and cell division

______ is the process by which new cells are formed from pre-existing cells.

• (1) Cell division

• (2) Cell growth

• (3) Cell elongation

• (4)None of these

Tags

NGSS.HS-LS1-4

Identify the correct statements for multicellular cell division.

I. Cell division carries out embryonic development and growth.

II. It plays a role in repair and maintenance of the body.

III. It is important for reproduction.

Choose the correct options

• (1) Only I

• (2) I and III

• (3)Only II

• (4)I, II and III

Tags

NGSS.HS-LS1-4

Cell with constant amount of DNA in cell cycle is in (a)   phase-

The correct sequence of phases of cell cycle is:

• G1→ G2→S→M

• M→G1→G2→S

• G1→S→G2→M

• S→G1→G2→M

During which phase of the interphase, the DNA synthesis stops?

• (1) Post-mitotic gap phase

• (2) Pre-mitotic gap phase

• (3) Synthesis phase

• (4)None of the above

G2-phase is also called

• (1) Post-mitotic gap phase

• (2) Synthetic phase

• (3) Pre-mitotic gap phase

• (4)Only division

Tags

NGSS.HS-LS1-4

How many times do DNA replicate?

• (1) Twice in each cell cycle

• (2) Only once in each cell cycle

• (3) Once in mitotic cell cycle, once in meiotic-I (reductional division) and once in meiotic-II (equational division)

• (4) None of the above

The number of DNA (ds strands) present in chromosome at G2-stage of cell cycle is

• one

• two

• three

• none

In humans, what is the approximate percentage duration of cell cycle that comes under interphase?

• 99%

• 95%

• 70%

• 25%

Tags

NGSS.HS-LS1-4

Duration of cell cycle is

• (1) Same for all organisms

• (2) Same for all cells of an organism

• (3) Cell specific

• (4) All of the above