lecture 16

Question 1

Meiosis has two consecutive nuclear divisions, resulting in daughter cells with half the number of chromosomes as the parent cell

Answer 1

true dat

Question 2

The eukaryotic cell cycle consists of several phases and is regulated by a molecular control system

Answer 2

true dat

Question 3

The eukaryotic cell cycle is controlled by specific molecular signals that trigger the transition from one phase to another

Answer 3

true dat

Question 4

Most _____ cells of a multicellular eukaryote are arrested in G1 phase

Answer 4

somatic

Question 5

During development, growth, repair, or normal cell replacement cells progress through the cell cycle

Answer 5

yepp

Question 6

Cyclins are synthesized during __

Answer 6

G1

Question 7

CDK activation occurs in the presence of ____

Answer 7

cyclin

Question 8

Cyclins are _____ and ______

Answer 8

transient

unstable

Question 9

Progression from G1 to S requires active _____

Answer 9

CDK

Question 10

g1-s CDK _______ Retinoblastoma (RB) proteins

Answer 10

phosphorylates

Question 11

Unphsphorylated RB ____ the cell cycle at restriction point; cell does not enter S phase

Answer 11

inhibits

Question 12

G1S CDK essentially disables RB so RB doesn’t inhibit the cell cycle

Answer 12

true dat

Question 13

When RB is phosphorylated by G1-s cyclin-CDK, cell becomes committed to ______ DNA

Answer 13

replicating

Question 14

IF there is DNA damage in G1, p21 protein _____ activation of G1-S CDK

Answer 14

prevents