Question 1

Which of the following organelles would be abundant and in close proximity to the cell plate in a plant cell undergoing cytokinesis?

Accepted Answer

The Golgi apparatus is involved in the synthesis and transport of cell wall components to the cell plate during plant cell cytokinesis, making it abundant and in close proximity to the cell plate during this process.

Question 2

Losing weight can reduce an obese person's risk for cancer by up to 40%.

Accepted Answer

Losing weight can significantly reduce the risk of certain types of cancer, as obesity is a known risk factor for various cancers. Studies have shown that weight loss can lower cancer risk by improving metabolic health and reducing inflammation.

Question 3

Which of the following statements is correct regarding the events of the cell cycle?

Accepted Answer

Interphase, which is the phase of the cell cycle where the cell prepares for division, consists of three subphases: G1 (first gap), S (synthesis, where DNA replication occurs), and G2 (second gap).

Question 4

Stem cells that contain telomerase can be found in adults.

Accepted Answer

Adult stem cells, such as those found in bone marrow, do contain telomerase, which helps maintain their ability to divide and regenerate tissues throughout an individual's life.

Question 5

When during the cell cycle are chromosomes visible under a microscope?

Accepted Answer

Chromosomes become highly condensed and visible under a light microscope during mitosis, when cells divide.

Question 6

Proto-oncogenes function by preventing cells from dividing uncontrollably.

Accepted Answer

Proto-oncogenes actually promote cell division and growth. When mutated, they can become oncogenes and contribute to uncontrollable cell division, leading to cancer.

Question 7

Cancer cells have abnormal chromosomes because they express telomerase when they should not.

Accepted Answer

The answer of Cancer cells have abnormal chromosomes because they...

Question 8

Susan was examining a cell under the microscope and noticed the formation of a cell plate in the midline of the cell and the formation of nuclei at opposite poles of the cell. The cell under examination was most likely a(n)

Accepted Answer

The formation of a cell plate in the midline of the cell during division is characteristic of plant cells undergoing cytokinesis. This process is distinct from animal cells, which typically form a cleavage furrow instead.

Question 9

Differentiated cells, such as nerve cells, would be in which of the following stages of the cell cycle?

Accepted Answer

Differentiated cells, such as nerve cells, are typically in the G0 phase, which is a state of quiescence or dormancy where they do not actively divide. This phase is not explicitly listed in the options, but option B (G0) is intended to represent this phase, despite the encoding error in the text.

Question 10

The G ₂ checkpoint prevents the cell cycle from continuing until

Accepted Answer

The G1/S checkpoint, also known as the G1 checkpoint, ensures that the cell's DNA is intact and fully replicated before it proceeds into the S phase, where DNA is synthesized. This checkpoint prevents the cell from replicating damaged DNA.

Question 11

Cancer will occur if one copy of a mutant tumor suppressor gene is inherited.

Accepted Answer

Cancer typically occurs when both copies of a tumor suppressor gene are mutated or inactivated; inheriting one mutant copy may increase risk but does not guarantee cancer will occur.

Question 12

What structure holds two sister chromatids together?

Accepted Answer

The centromere is the region of a chromosome where two sister chromatids are joined together, playing a crucial role during cell division.

Question 13

A centromere holds together twov: 03_11_2019_QC_CS-162215

Accepted Answer

The answer of A centromere holds together twov: 03_11_2019_QC_CS-162215
...

Question 14

Which of the following represents the phases of mitosis in their proper sequence?

Accepted Answer

The correct sequence of mitosis phases is prophase, metaphase, anaphase, and telophase.

Question 15

Chromatin wrapped around histones form a bead-like structure known as a

Accepted Answer

Nucleosomes are the structural units of chromatin, consisting of a segment of DNA wound around a core of histone proteins, resembling beads on a string.

Question 16

Which items in the following pairs are correctly matched?

Accepted Answer

C) S phase is correctly matched with DNA replication. During the S phase of the cell cycle, DNA replication occurs, ensuring that each daughter cell receives a complete set of chromosomes.

Question 17

If you were looking under the compound light microscope at an onion root tip, in what stage of the cell cycle would the majority of the cells be?

Accepted Answer

The majority of cells in any actively growing tissue, such as an onion root tip, would be in interphase. This is the stage where cells spend most of their time, performing their regular functions and preparing for division by replicating their DNA.

Question 18

Nuclear division occurs during

Accepted Answer

The answer of Nuclear division occurs during
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Question 19

Which of the following is an inaccurate statement about mitosis?

Accepted Answer

Mitosis results in two daughter cells that are genetically identical to the parent cell, meaning they contain the full set of necessary genetic material, not just half.

Question 20

Translocations can lead to cancer if they disrupt the genes that regulate the cell cycle.

Accepted Answer

Translocations, which involve the rearrangement of parts between nonhomologous chromosomes, can disrupt genes that regulate the cell cycle. If such genes are altered or their expression is affected, it can lead to uncontrolled cell division, a hallmark of cancer.

Quiz 8: Cellular Reproduction