Question 1 Which one of the following statements is TRUE regarding the G0 phase

Question

Question 1

Which one of the following statements is TRUE regarding the G0 phase of the cell cycle?

Neurons and osteocytes remain in G0 after adolescence.

Stems cells in the bone marrow are typically in the G0 phase.

Most cancer cells that show uncontrolled mitotic divisions have entered the G0 phase

G0 is an abnormal state, and cells in this stage have been damaged.

Question 3

Chromosomes first become visible as two sister chromatids held together at the centromere during which one of the following phases of meiosis?

anaphase

telophase

prophase

S phase

Question 4

The process by which cells become specialized from one another is called:

pluripotency.

mitosis.

differentiation.

meiosis specialization.

Question 5

Cell differentiation of a human pre-embryo begins:

after the 4-cell stage.

after the 8-cell stage.

after the 2-cell stage.

after the 32-cell stage.

Question 6

Monozygotic twins, each have a separate placenta.

True

False

Question 7

The two fertility techniques "in vitro fertilization" (IVF) and "gamete intrafallopian transfer" (GIFT) are fundamentally different in that:

Embryos are conceived outside the body when the fertility technique of "in vitro fertilization" is used.

Monozygotic twins can only arise using "gamete intrafallopian transfer".

Embryos are conceived outside the body when the fertility technique of "gamete intrafallopian transfer" is used.

For both "in vitro fertilization" and "gamete intrafallopian transfer" conception occurs outside the body.

Question 8

The result of mitosis is the production of two daughter cells that are genetically identical to each other but not to the parent cell.

True

False

Question 9

A drug that interferes with the development and function of microtubules would interfere with:

metaphase and anaphase of mitosis.

chromosomal duplication.

G0 phase of the cell cycle.

G1 phase of the cell cycle.

metaphase and anaphase of mitosis.

Explanation / Answer

1.

Ans- Neurons and osteocytes remain in G0 after adolescence.

Explanation:

The G0 phase refers to the resting phase of the cell cycle where the cell is neither divided nor prepared to divide. Some types of cells enter into G0 phase for survival. When nutrients become less available in a cell, they enter into G0 phase until there was enough. Some enter for preventing the spread of diseases and they go to this phase due to lack of the proper organelles. Example- neurons don't have centrioles

3.

Ans- S phase

Explanation:

During anaphase, sister chromatids become daughter chromosomes and move toward the poles.

During telophase, nuclear envelopes and nucleoli reappear.

During prophase, nucleolus disappears.

In S phase, replication of DNA begins where the chromosome is replicated and form two sister chromatids that held by cohesion protein at the centromere.

4.

Ans- differentiation

Explanation:

Pluripotent cells able to form all the cell types for the development of the body. In short, it is the master of cells.

Mitosis cell division forms two daughter cells with the same number of chromosomes as the parent nucleus.

Differentiation is the process where cells become specialized from one another to perform different functions through gene expression.

Meiosis division form four daughter cells with half the number of chromosomes of the parent cell.

5.

Ans- after the 8-cell stage.

Explanation:

Embryo development occurs after the zygote formation. The embryo undergoes a series of divisions through 2-cell embryo, 4-cell embryo, 8 cell embryo and 16 cell embryo. After 8 cell stage, a significant change takes place in a blastula such as a cell polarity, cell specification, formation of an axis and cell differentiation.

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