Bio Review Chapter 5

Question 1

what is a chromosome?

Answer 1

double helix of DNA

Question 2

what is chromatin

Answer 2

loose DNA and its proteins

Question 3

histone

Answer 3

protein

Question 4

Chromatid

Answer 4

half a chromosome

Question 5

super coiling

Answer 5

happens during interphanse

Question 6

what are the 3 stages of interphase
what happens in each stage

Answer 6

G1 - growth
s phase - DNA is replicated
G2 - prepares for cell division and more growth

Question 7

what stage does a cell spend most of its life

Answer 7

interphase

Question 8

what is the proper order of the stages in mitosis

Answer 8

Prophase
Metaphase
Anaphase
Telaphase

Question 9

know what happens in each phase of mitosis

Answer 9

REMBER

Question 10

What is cytokinesis

Answer 10

dividing plasma

Question 11

what is the purpose of checkpoints in the cell

Answer 11

checks the condition of the cell

Question 12

what is cancer?
why don’t your cells stop this?

Answer 12

uncontrolled ell growth
bypasses checkpoints

Question 13

what is the difference btwn an oncogene and a tumor suppressor gene

Answer 13

Oncogene - cells divide as long as its activated (Gas pedal)
Tumor suppressor gene - cells divide if not activated (brake pedal)

Question 14

what are 2 kinds of cancer?
What is the difference btwn them?

Answer 14

benign - slowly grows, stays in place (tumor)
malignant - Grows fast, spreads fast

Question 15

which type of cancer is worse to have

Answer 15

malignant

Question 16

what is carcinogen?
what are examples of carcinogens?

Answer 16

something that causes cancer (mutates the DNA)
smoking, coal, alcohol, exhaust leather dust.

Question 17

what kind of treatment is there for cancer?

Answer 17

surgury
chemotherapy & radiation

Question 18

why is it so important catch cancer early

Answer 18

so it won’t spread any further making it harder to treat