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Biology > Test 4 > Flashcards

Test 4 Flashcards

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AP® Biology flashcards Biology 101 flashcards
1
Q

A photosystem consists of chlorophyll,

A

Electron acceptor, and other light gathering molecules like carotene

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2
Q

Which color of light has the longest wavelength?

A

Red

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3
Q

What two chemicals are produced by non-cyclic electron flow?

A

ATP and NADPH

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4
Q

What is the function of an electron acceptor molecule?

A

It holds high energy electrons to stop them from wasting the energy as heat

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5
Q

Give an example of a CAM plant

A

Cactus

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6
Q

Which two cancers below have a low genetic risk?

A

Lung and uterus

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7
Q

Roughly how many genetic combinations in humans are caused by independent assortment of chromosomes alone?

A

8 million

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8
Q

What molecule in the nucleus controls the copying of DNA?

A

Cyclin

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9
Q

During which stage in meiosis is the chromosome number halved?

A

Anaphase I

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10
Q

What chemical do plants absorb through the roots to allow them to make proteins?

A

Nitrate

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11
Q

Normal cells will only divide by mitosis if

A

The correct growth factor is present and each cell is not completely surrounded by other cells

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12
Q

What stage in mitosis has two groups of chromosomes moving apart towards opposite ends of the cell?

A

Telophase

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13
Q

What type of cancer has an annual death rate of 57,000 and is the second biggest killer in terms of cancer in the US?

A

Colon

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14
Q

What type of gene prevents mitosis, or makes cancer cells commit suicide?

A

Tumor suppressor genes

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15
Q

Roughly when did Gregor Mendel conduct most of his work?

A

1860

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16
Q

If two heterozygous individuals are crossed in a situation of incomplete dominance, the expected ratio of phenotypes in the offspring is

A

1:2:1

17
Q

A test cross always crosses the unknown with a

A

Homozygous recessive

18
Q

What is meant by heterotroph?

A

Take in organic molecules ready made

19
Q

C4 plants can store carbon dioxide as molecules of

A

Oxaloacetate

20
Q

Give an example of polygenic inheritance

A

Average sized parents can have a very tall child

21
Q

If a human cell with 46 chromosomes undergoes mitosis, this will produce two cells, each with

A

46 chromosomes

22
Q

What is a proto-onco gene?

A

It starts mitosis

23
Q

If a gene has a different effect depending on whether it came from your mother or your father, this is called

A

Imprinting

24
Q

What are Barr bodies?

A

An inactive X chromosome in females

25
Q

How much of a chromosome is genes?

A

10%

Biology (19 decks)

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