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Flashcards in Test 4 Deck (25):
1

A photosystem consists of chlorophyll,

Electron acceptor, and other light gathering molecules like carotene

2

Which color of light has the longest wavelength?

Red

3

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

ATP and NADPH

4

What is the function of an electron acceptor molecule?

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

5

Give an example of a CAM plant

Cactus

6

Which two cancers below have a low genetic risk?

Lung and uterus

7

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

8 million

8

What molecule in the nucleus controls the copying of DNA?

Cyclin

9

During which stage in meiosis is the chromosome number halved?

Anaphase I

10

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

Nitrate

11

Normal cells will only divide by mitosis if

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

12

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

Telophase

13

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?

Colon

14

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

Tumor suppressor genes

15

Roughly when did Gregor Mendel conduct most of his work?

1860

16

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

1:2:1

17

A test cross always crosses the unknown with a

Homozygous recessive

18

What is meant by heterotroph?

Take in organic molecules ready made

19

C4 plants can store carbon dioxide as molecules of

Oxaloacetate

20

Give an example of polygenic inheritance

Average sized parents can have a very tall child

21

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

46 chromosomes

22

What is a proto-onco gene?

It starts mitosis

23

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

Imprinting

24

What are Barr bodies?

An inactive X chromosome in females

25

How much of a chromosome is genes?

10%