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Test: Cell division - Grade 10 MCQ


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10 Questions MCQ Test Biology for Grade 10 - Test: Cell division

Test: Cell division for Grade 10 2024 is part of Biology for Grade 10 preparation. The Test: Cell division questions and answers have been prepared according to the Grade 10 exam syllabus.The Test: Cell division MCQs are made for Grade 10 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Cell division below.
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Test: Cell division - Question 1

What are guard cells in plants specialised to do?

Detailed Solution for Test: Cell division - Question 1

Guard cells in plants are specialised to open and close to let carbon dioxide into the leaf for photosynthesis. The two guard cells form the boundary of a stoma.

Test: Cell division - Question 2

Which statement is correct of plant stem cells?

Detailed Solution for Test: Cell division - Question 2

Plant stem cells occur in meristems. Meristems are found just below the growing tip of the shoot and root.

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Test: Cell division - Question 3

A scientist observes 100 cancer cells with a microscope. If 16 cells are undergoing mitosis, and the length of the cell cycle is 400 hours, what is the length of mitosis?

Detailed Solution for Test: Cell division - Question 3

If 16 out of 100 cells are undergoing mitosis, and the cell cycle is 400 hours, then mitosis lasts for 64 hours. The calculation is 16/100 x 400.

Test: Cell division - Question 4

What happens in the stage that is before mitosis in the cell cycle?

Detailed Solution for Test: Cell division - Question 4

The stage before mitosis involves a period of growth, during which time DNA is checked for errors. The daughter cells must be perfect copies of the parent cell.

Test: Cell division - Question 5

How many chromosomes does a human have in each body cell?

Detailed Solution for Test: Cell division - Question 5

Humans have 23 pairs of chromosomes in each body cell. These consist of 22 pairs of autosomes, and a pair of sex chromosomes.

Test: Cell division - Question 6

Why are meristematic cells grown in a sterile culture medium?

Detailed Solution for Test: Cell division - Question 6

Meristematic cells are grown in sterile culture media to avoid the growth of microorganisms. Certain microorganisms will infect the meristematic cells in culture and may cause them to decay.

Test: Cell division - Question 7

Which of the following is an ethical consideration about the use of embryonic stem cells?

Detailed Solution for Test: Cell division - Question 7

An ethical consideration about embryonic stem cell use is that embryos are being produced just so that stem cells can be extracted for research. Some people question whether it is right to do this.

Test: Cell division - Question 8

Which statement about stem cells is correct?

Detailed Solution for Test: Cell division - Question 8

Embryonic stem cells can differentiate into different cell types. Adult stem cells can differentiate into cells of a similar type only.

Test: Cell division - Question 9

Which statement is correct about the cells produced by mitosis?

Detailed Solution for Test: Cell division - Question 9

Two daughter cells are produced when a cell divides by mitosis. Each has the same number of chromosomes as the parent cells. Cells produced by mitosis must be identical to the parent cells.

Test: Cell division - Question 10

Which statement is true of genes?

Detailed Solution for Test: Cell division - Question 10

A gene is a short section of DNA that codes for a protein. It is estimated that there are around 20 000 to 25 000 genes that code for proteins.

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