Question 1

Which of the following best describes the main function of the glycocalyx in animal cells?

Accepted Answer

It contains receptors that detect external signals and helps the cell communicate with its environment.

Question 2

A scientist is studying a cell that lacks a membrane-bound nucleus and has circular DNA. Which type of cell is she most likely observing?

Accepted Answer

Prokaryotic cell

Question 3

Which organelle is responsible for the synthesis of fatty acids and phospholipids in eukaryotic cells?

Accepted Answer

Smooth endoplasmic reticulum

Question 4

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

Accepted Answer

S phase

Question 5

A mutation disrupts the function of centrioles in an animal cell. Which process would be most directly affected?

Accepted Answer

Chromosome movement during mitosis

Question 6

Which of the following statements about homologous chromosomes is TRUE?

Accepted Answer

They carry genes for the same inherited characteristics but may have different alleles.

Question 7

What is the correct sequence of events during mitosis?

Accepted Answer

Prophase, Prometaphase, Metaphase, Anaphase, Telophase

Question 8

Which structure is the attachment site for spindle fibers during mitosis?

Accepted Answer

Kinetochore

Question 9

A patient is diagnosed with a genetic disorder caused by a mutation in a gene located on the X chromosome. Which term best describes the genetic status of the Y chromosome for this gene in a male patient?

Accepted Answer

Hemizygous

Question 10

Which of the following best explains why chromosomes are most visible and suitable for karyotyping during metaphase?

Accepted Answer

Chromosomes are condensed and aligned at the metaphase plate.

Question 11

If a human somatic cell undergoes mitosis, how many chromosomes will each daughter cell have?

Accepted Answer

$$46$$

Question 12

Which checkpoint in the cell cycle ensures that all chromosomes are properly attached to the spindle before anaphase begins?

Accepted Answer

M checkpoint

Question 13

Which of the following is a function of the nucleolus?

Accepted Answer

Ribosomal RNA synthesis

Question 14

A cell is observed with chromosomes aligned at the center of the cell, spindle fibers attached, and the nuclear envelope completely disassembled. Which stage of mitosis is this cell in?

Accepted Answer

Metaphase

Question 15

Which of the following best describes the difference between a centriole and a centromere?

Accepted Answer

A centriole organizes spindle fibers, while a centromere is the attachment site for spindle fibers on chromosomes.

Question 16

Which cytoskeletal component is primarily responsible for the movement of chromosomes during mitosis?

Accepted Answer

Microtubules

Question 17

A mutation in a cyclin gene results in the loss of its function. What is the most likely consequence for the cell cycle?

Accepted Answer

The cell cycle will be unable to progress past certain checkpoints.

Question 18

Which of the following best describes the packaging of DNA in eukaryotic cells?

Accepted Answer

DNA is wrapped around histone proteins to form nucleosomes, which further coil to form chromatin and chromosomes.

Question 19

Which of the following is NOT a function of the plasma membrane?

Accepted Answer

Synthesizing proteins for the cell

Question 20

A researcher observes a cell with a cell wall containing peptidoglycan. Which type of organism is this cell most likely from?

Accepted Answer

Bacterium

Mitosis and Cell Structure: Foundations for Genetic Continuity

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