2If a scientist is studying the formation of new blood vessels within a tumor, he or she would be st

2If a scientist is studying the formation of new blood vessels within a tumor, he or she would be studying the process of

Select one:

a morphogenesis

b blood vessel promotion

c carcinogenesis

d apoptosis

e angiogenesis

3

Which are cancer-causing genes in mice and humans?

Select one:

a totipotent genes

b proto-oncogenes

c oncogenes

d inducible genes

e tumor suppressor genes

4

One gene has exons LMNOP In nerve cells, the mRNA molecules from this gene contain the exons LMN In muscle cells, the mRNA molecules from this contain MNO What causes the difference between the mRNA molecules in different tissues?

Select one:

a DNA activation

b DNA processing

c mRNA posttranslational control

d mRNA activation

e pre-mRNA splicing

5

What kind of access does RNA Polymerase have to heterochromatin?

Select one:

a none

b moderate

c easy

d varied by chromosome

e permanent

6

Transcription activator proteins bind to _(blank) _ on DNA

Select one:

a enhancers

b regulatory genes

c operators

d promoters

e repressors

7

Which molecules regulate the process of transcription by binding genes and turning on their expression?

Select one:

a transcriptional factors

b posttranslational control promoters

c repressible control factors

d translational factors

e heterochromatin factors

8

Which of the following occurs outside of the nucleus in eukaryotic cells?

Select one:

a chromatin packing

b mRNA processing

c transcriptional control

d translational control

e posttranscriptional control

9

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Question text

Which of the following genes is located outside the operon and codes for a repressor protein that can deactivate the operon?

Select one:

a structural gene

b promoter gene

c regulatory gene

d homeotic gene

e operator gene

10

What is the role of transcription factors?

Select one:

a binding heterochromatin to prevent transcription

b binding promoter of a gene to start translation

c binding promoter to start transcription

d binding operator to prevent transcription

e binding repressor to prevent transcription

11

Which of the following statements is true about the lac operon?

Select one:

a The lac operon is usually turned off in the presence of lactose

b The lac operon is usually turned on in the presence of any sugar

c The lac operon is usually turned on in the presence of glucose

d The lac operon is usually expressed continuously in the cell

e The lac operon is usually turned on in the presence of lactose

12

What is the inactive X chromosome found in females?

Select one:

a a Barr body

b a histone

c a nucleosome

d a repressible chromosome

e an inducible chromosome

13

Which of the following would, if found, be a new discovery about stimulatory signal transduction pathways for the development of cancer?

Select one:

a activating factor

b transcription factor

c growth factor

d oncogene

e receptor

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