BIOL1003 Lecture Notes - Lecture 3: Spindle Apparatus, G0 Phase, Nuclear Membrane

Question 10

A microscope image of a cell in interphase is treated with dyes to stain the nucleic acids (DNA and RNA). This image probably displays ______.

1 points

Question 11

To observe plant cells undergoing mitosis, the best plant tissue to isolate would be ______.

1 points

Question 12

Owen observes a slide containing whitefish blastula sections. He finds a cell with visible spindle lines extending from two points on opposite sides of the cell and chromosomes as small black Xs halfway between the two poles. What stage of the cell cycle is Owen observing?

1 points

Question 13

What structural feature can you use to distinguish between DNA-stained onion cells in anaphase and telophase?

1 points

Question 14

A carcinogen is any substance or environmental condition that ______.

1 points

Question 15

Angelina observes a slide containing whitefish blastula sections. She finds a cell with visible spindle lines extending from two points on opposite sides of the cell and chromosomes as small black Xs halfway between the two poles. What intracellular structure forms each of the two points on opposite sides of this cell?

1 points

Question 16

Which of the following best describes the relationship between interphase and the cell cycle?

Question 17

Radiation therapy and chemotherapy are cancer treatments that primarily attack cancer cells through ______.

Question 1 (2 points)

In which phase of cell division is marked by the dissolution of the nuclear membrane, the condensation of chromosomes, and the formation of the mitotic spindle?

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Question 2 (2 points)

The physical separation of cells during cell division is called:

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Question 3 (2 points)

Meiosis is necessary for sexual reproduction; the gametes formed during this process before fertilization are _______________.

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Question 4 (2 points)

Mitosis is the process by which a ___________ cell separates the chromosomes in its nucleus into two identical sets of nuclei.

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Question 5 (2 points)

Which of the following statements about crossing over is INCORRECT?

Question 5 options:

Lab 11 Mitosis

Interphase - Chromosomes are not visible because they areuncoiled

Prophase- The chromosomes coil. The nuclear membranedisintegrates. Spindle fibers (microtubles) form. The drawing showsa cell with 8 chromosomes. Each chromosome has 2 chromatids for atotal of 16 chromatids.

Prometaphase

Metaphase - The chromosomes become aligned. The drawing shows acell with 8 chromosomes. Each chromosome has 2 chromatids for atotal of 16 chromatids.

Anaphase- The chromatids separate; the number of chromosomesdoubles. The drawing shows a cell with 16 chromosomes. Eachchromosome has 1 chromatid for a total of 16chromatids

Telophase- The cell divides into two. The chromosomes uncoil.The nucleus reforms. The spindle apparataus disassembles. Thedrawing shows a cell with 16 chromosomes. Each chromosome has 1chromatid for a total of 16 chromatids.

Ques(ons

1. What stage were most of the onion root p cells in? Does thismake sense?

2. As a cell grows, what happens to its surface area : volumerao? (Think of a balloon being blown up). How is this changing raonrelated to cell division?

3. What is the function of mitosis in a cell that is about todivide?

4. How accurate were your met predictions for each stage of thecell cycle?

5. Discuss one observation that you found interesting whilelooking at the onion root p cells.

6. What would happen if mitosis were uncontrolled?

for escience lab 11 bio 113