cell diversity - exam papers

Question 1

the nuclear membrane temporarily disappears during mitosis

Answer 1

true

Question 2

the chromosomes are double-stranded at the start of prophase

Answer 2

true

Question 3

prophase is the period of the cell cycle when the cell is not dividing

Answer 3

false

Question 4

the spindle fibers contract during anaphase

Answer 4

true

Question 5

at the end of mitosis, a plant cell splits in two by forming a cleavage furrow

Answer 5

false

Question 6

mitosis gives rise to four haploid daughter cells

Answer 6

false

Question 7

cancer results when the cells lose their ability to control meiosis

Answer 7

false

Question 8

describe two events that occur during prophase

Answer 8

Nuclear membrane breaks down, chromosomes become shorter and spindle fibres forms

Question 9

Describe one event that occurs during metaphase

Answer 9

spindles attach to chromosome

Question 10

Draw a labelled diagram of a cell with a diploid number of four at anaphase of mitosis

Answer 10

Eight chromosomes
Chromosomes being pulled apart
labels - chromosome / spindle / equator / poles / centromere

Question 11

Describe how cell division occurs in
An animal cell

Answer 11

Cleavage furrow forms

Question 12

Describe how cell division occurs in:
A plant cell

Answer 12

cell plate forms

Question 13

Name the stage of mitosis shown in the diagram

Answer 13

anaphase

Question 14

Justify your answer : anaphase

Answer 14

Spindle shortening and spindle contracting

Question 15

Identify the part labeled X in the diagram

Answer 15

spindle

Question 16

Explain what is meant by the term diploid

Answer 16

two sets of chromosomes

Question 17

State the diploid number of the cell containing this nucleus

Answer 17

4

Question 18

Outline one function of mitosis in humans

Answer 18

growth and repair tissue

Question 19

Give one example of a human cell not produced by mitosis

Answer 19

gamete

Question 20

spindle fibres contract during metaphase of mitosis

Answer 20

false

Question 21

glucose is produced by yeast cells during fermentation

Answer 21

false

Question 22

the process of translation results in a protein being made

Answer 22

true

Question 23

prokaryotic cells contain a nucleus

Answer 23

false

Question 24

darwin and Wallace proposed the theory of natural selection

Answer 24

true

Question 25

a mutation to a cell's DNA always has a negative impact for the cell

Answer 25

false

Question 26

the ribosome of the cell contains the chromosomes

Answer 26

false

Question 27

which type of microscope is used in the school laboratory to observe cells like these

Answer 27

light microscope

Question 28

give two observable events that happen during prophase

Answer 28

nuclear membrane breaks down and spindle forms

Question 29

m on metaphase

Answer 29

6th cell from the left

Question 30

A on anaphase

Answer 30

2nd cell from left

Question 31

describes what happens in animal cells and plant cell after mitosis

Answer 31

in animal - cleavage in plant cells - cell plate

Question 32

what stage of the cell cycle is represented by X

Answer 32

interphase

Question 33

define mitosis

Answer 33

cell forming two identical daughter cells

Question 34

state two ways in which meiosis differs from mitosis

Answer 34

four nuclei produced variation not identical

Question 35

explain term cancer

Answer 35

a group of disorders due to uncontrolled rate of mitosis

Question 36

explain diploid

Answer 36

two sets of chromosomes

Question 37

what's the function of mitosis in single-celled organisms

Answer 37

asexual reproduction

Question 38

what is the function of mitosis in multi-celled organisms

Answer 38

repair of tissue

Question 39

what term is used to describe the long stage of the cell cycle when cell division is not occurring?

Answer 39

interphase

Question 40

name two types of biomolecule that are produced in the cell during this stage of the cell cycle

Answer 40

protein and fat

Question 41

name one organelle that is replicated at this stage of the cell cycle

Answer 41

mitochondria

Question 42

give any two other changes which will have occurred in the cell by the end of this stage of the cell cycle

Answer 42

short chromosomes formation of spindle

Question 43

why no division of red blood cells

Answer 43

no nucleus

Question 44

single-celled organisms use meiosis for asexual reproduction

Answer 44

false

Question 45

in telophase of mitosis, a cleavage furrow forms in plant cells

Answer 45

false

Question 46

when a cell is not dividing it is said to be in prophase

Answer 46

false

Question 47

the nuclear membrane disappears in the early part of mitosis

Answer 47

true

Question 48

centromeres give rise to the nuclear spindle

Answer 48

false

Question 49

mitosis is a source of variation

Answer 49

false

Question 50

in multicellular organisms, mitosis is primarily used for growth

Answer 50

true

Question 51

what name is applied to the period of the cell cycle in which division is not taking place?

Answer 51

interphase

Question 52

give a cellular process that occurs during this period in which the nucleus is not diving

Answer 52

growth

Question 53

what is the role of mitosis in single-celled organisms

Answer 53

reproduction

Question 54

what medical term is used for the group of disorders in which certain cells lose normal control of mitosis?

Answer 54

cancer