Question 1

Which of the following best describes the role of cell division in multicellular organisms?

Accepted Answer

It is responsible for growth, development, and repair of tissues.

Question 2

During which phase of the cell cycle does DNA replication occur?

Accepted Answer

S phase

Question 3

What is the correct sequence of events during binary fission in bacteria?

Accepted Answer

Chromosomes replicate, each copy attaches to plasma membrane, membrane elongates, plasma membrane pinches inward, cell wall forms between daughter cells.

Question 4

Which structure is the aggregate mass of dispersed genetic material formed of DNA and protein in eukaryotic cells?

Accepted Answer

Chromatin

Question 5

A scientist observes a cell with two 'arms' extending from a central region. What is the name of this central region, and what is its function?

Accepted Answer

Centromere; joins two sister chromatids

Question 6

Which phase of mitosis is characterized by the alignment of chromosomes at the cell's equator?

Accepted Answer

Metaphase

Question 7

What is the main difference between cytokinesis in animal cells and plant cells?

Accepted Answer

Animal cells form a cleavage furrow, while plant cells form a cell plate.

Question 8

Stem cells are unique because they:

Accepted Answer

Can self-renew and differentiate into a variety of cell types.

Question 9

Which of the following is true about asexual reproduction?

Accepted Answer

It produces genetically identical offspring from a single parent.

Question 10

If a eukaryotic cell fails to complete cytokinesis after mitosis, what is the most likely result?

Accepted Answer

A single cell with two nuclei

Question 11

Which of the following best describes the function of the mitotic spindle during cell division?

Accepted Answer

It separates sister chromatids and moves them to opposite poles.

Question 12

During which phase of mitosis do sister chromatids separate and move toward opposite poles?

Accepted Answer

Anaphase

Question 13

Which of the following nucleotide sequences could be found in a DNA molecule?

Accepted Answer

Adenine, thymine, guanine, cytosine

Question 14

A cell is observed to have high metabolic activity, duplicated chromosomes, and organelles, but is not currently dividing. Which phase is it most likely in?

Accepted Answer

Interphase

Question 15

Which of the following equations best represents the number of DNA molecules after S phase in a cell with $$n$$ chromosomes?

Accepted Answer

$$2n$$

Question 16

In which type of reproduction are gametes involved?

Accepted Answer

Sexual reproduction

Question 17

Which of the following is NOT a characteristic of cell division?

Accepted Answer

Fusion of two parent cells

Question 18

A mutation occurs in the centromere region of a chromosome. Which process would be most directly affected?

Accepted Answer

Attachment of spindle fibers and separation of sister chromatids

Question 19

Which of the following best explains why daughter cells produced by mitosis are genetically identical to the parent cell?

Accepted Answer

Because DNA is replicated and equally distributed before division.

Question 20

A researcher observes a cell in which the nuclear envelope is disappearing and spindle microtubules are attaching to chromosomes. Which phase is this?

Accepted Answer

Late prophase

Cellular Reproduction and the Cell Cycle: Study Notes

Guida di studio - Domande di pratica

Study guide - Flashcard