Cell n molecular final exam 2

Question 1

False about splicing in Eukaryotes

Answer 1

It is preformed in the cytoplasm

Question 2

Operons definition

Answer 2

Contain cluster of genes transcribed as single mRNA

Question 3

White blood cells and neurons are different because

Answer 3

Neurons express some mRNAs that white blood cells do not

Question 4

How does appropriate amino acid get attached to each tRNA

Answer 4

Amino acyl tRNA synthetases attached them

Question 5

Which amino acid would tRNA anticodon 3’-CUU-5’ to carry

Answer 5

Glutamic acid

Question 6

What is not complimentary to the DNA sequence it is transcribed from

Answer 6

Poly A tail

Question 7

Diff cell types in multicellular organisms distinct characteristics result mainly from the differential regulation of the

Answer 7

Transcription of genes transcribed by RNA polymerase II

Question 8

What do mRNA affect

Answer 8

Translation of specific genes

Question 9

Combinatorial control of gene expression involves what

Answer 9

Groups of transcriptional regulators working together to determine the expression of a gene

Question 10

Molecular nature of EVE genes regulatory region means that

Answer 10

There are 7 regulatory elements and each is sufficient for driving expression in a single stripe

Question 11

Best description of microRNAs

Answer 11

Molecules that control gene expression by base pairing with specific mRNAs

Question 12

Does not occur spontaneously in biological membranes

Answer 12

Switch between lipid layers

Question 13

Ions most abundant inside of typical mammalian cell

Answer 13

K+

Question 14

Gates channels involved in inhibitory synaptic signaling

Answer 14

Glycine- gated Cl- channels

Question 15

What is required for secretion of neurotransmitters in response to action potential

Answer 15

Voltage gated Ca2+ channels

Question 16

Na+ going into cell with staring omV signal membrane potential is

Answer 16

Positive

Question 17

Mechanism for transduction for a G- protein coupled receptor

Answer 17

Initiating the exchange of bound GDP to GTP

Question 18

Mechanism of transduction for receptor tyrosine kinase

Answer 18

Phosphorylation of receptor dimers on the intercellular side

Question 19

Types of alteration that would prevent receptor dimerization

Answer 19

A mutation that prevents RGFR from binding to RGF

Question 20

Activating enzyme for a cascade that uses CAMP as 2nd messenger

Answer 20

Adenyl Cyclase

Question 21

When a G- protein coupled receptor activates G protein

Answer 21

The alpha subunit exchanges it’s bound GDP for GTP

Question 22

All membrane of steroid hormone receptor family

Answer 22

Interact with signal molecules that diffuse through the plasma membrane

Question 23

mRNA is read by the ribosome in the — direction and protein synthesized

Answer 23

5’ to 3’/ N terminus to C

Question 24

Present in eukaryotic primary transcript but Not in mature mRNA

Answer 24

Introns

Question 25

False about proteasome

Answer 25

Misfolded proteins are delivered to the proteasome where they assisted with refolding