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Biology > cell diversity - exam papers > Flashcards

cell diversity - exam papers Flashcards

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AP® Biology flashcards Biology 101 flashcards
1
Q

the nuclear membrane temporarily disappears during mitosis

A

true

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2
Q

the chromosomes are double-stranded at the start of prophase

A

true

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3
Q

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

A

false

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4
Q

the spindle fibers contract during anaphase

A

true

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5
Q

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

A

false

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6
Q

mitosis gives rise to four haploid daughter cells

A

false

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7
Q

cancer results when the cells lose their ability to control meiosis

A

false

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8
Q

describe two events that occur during prophase

A

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

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9
Q

Describe one event that occurs during metaphase

A

spindles attach to chromosome

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10
Q

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

A

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

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11
Q

Describe how cell division occurs in
An animal cell

A

Cleavage furrow forms

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12
Q

Describe how cell division occurs in:
A plant cell

A

cell plate forms

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13
Q

Name the stage of mitosis shown in the diagram

A

anaphase

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14
Q

Justify your answer : anaphase

A

Spindle shortening and spindle contracting

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15
Q

Identify the part labeled X in the diagram

A

spindle

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16
Q

Explain what is meant by the term diploid

A

two sets of chromosomes

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17
Q

State the diploid number of the cell containing this nucleus

A

4

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18
Q

Outline one function of mitosis in humans

A

growth and repair tissue

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19
Q

Give one example of a human cell not produced by mitosis

A

gamete

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20
Q

spindle fibres contract during metaphase of mitosis

A

false

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21
Q

glucose is produced by yeast cells during fermentation

A

false

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22
Q

the process of translation results in a protein being made

A

true

23
Q

prokaryotic cells contain a nucleus

A

false

24
Q

darwin and Wallace proposed the theory of natural selection

A

true

25
Q

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

A

false

26
Q

the ribosome of the cell contains the chromosomes

A

false

27
Q

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

A

light microscope

28
Q

give two observable events that happen during prophase

A

nuclear membrane breaks down and spindle forms

29
Q

m on metaphase

A

6th cell from the left

30
Q

A on anaphase

A

2nd cell from left

31
Q

describes what happens in animal cells and plant cell after mitosis

A

in animal - cleavage
in plant cells - cell plate

32
Q

what stage of the cell cycle is represented by X

A

interphase

33
Q

define mitosis

A

cell forming two identical daughter cells

34
Q

state two ways in which meiosis differs from mitosis

A

four nuclei produced
variation not identical

35
Q

explain term cancer

A

a group of disorders due to uncontrolled rate of mitosis

36
Q

explain diploid

A

two sets of chromosomes

37
Q

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

A

asexual reproduction

38
Q

what is the function of mitosis in multi-celled organisms

A

repair of tissue

39
Q

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

A

interphase

40
Q

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

A

protein and fat

41
Q

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

A

mitochondria

42
Q

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

A

short chromosomes
formation of spindle

43
Q

why no division of red blood cells

A

no nucleus

44
Q

single-celled organisms use meiosis for asexual reproduction

A

false

45
Q

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

A

false

46
Q

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

A

false

47
Q

the nuclear membrane disappears in the early part of mitosis

A

true

48
Q

centromeres give rise to the nuclear spindle

A

false

49
Q

mitosis is a source of variation

A

false

50
Q

in multicellular organisms, mitosis is primarily used for growth

A

true

51
Q

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

A

interphase

52
Q

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

A

growth

53
Q

what is the role of mitosis in single-celled organisms

A

reproduction

54
Q

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

A

cancer

Biology (15 decks)

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