helen mason Flashcards Preview

cell biology 2 > helen mason > Flashcards

Flashcards in helen mason Deck (21):
1

where is phosphorylation performed

amino acids with hhydroxyl side chains, for example serine

2

discuss the differences between the two types of endocrine hormones

steroid hormones require transport proteins and have a slow speed of action. bind to and activate transcription factors

peptide hormones do not need a transport protein. cause phosphorylation, which activates proteins. peptide hormones are more rapid than steroid hormones

3

discuss what type of hormone insulin is and what its receptor is called

insulin is a peptide hormone and its receptor is called receptor tyrosine kinase (RTK)

4

which gland produces cortisol

adrenal cortex gland

5

all known mitochondrial genomes code for

cytochrome B

6

when proteins are bing glycosylated in the ER, which molecule is the oligosaccaride transferred from

dolichol phosphate

7

where is Bip found and what type of chaperon is it

hsp70

endoplasmic reticulum

8

where are mucins glycosylated and where does this glycosylation take place

Golgi Apparatus

O-linked

9

the adenine nucleotide translocator is imported into the mitochondria by what proteins

TOM and TIM22

10

another term for Km

michaelis constant

11

what is the RXL recruitment site

a site on the cyclin A subunit, that binds to substrates

12

where is the ATP acitve site of Cdk

between the alpha and beta domains

13

how does the glyphosate herbicide work

it inhibits the EPSP synthase

14

state the name of muscle cells and describe their structure

myofibers are long, thin and multinucleate

15

what is the name of the cytoplasm in muscle cells

sarcoplasm

16

what does each myofibre cell consist of

many linear structures called myofibrils

17

what do myofibrils consist of

sarcomere contractile units

18

describe the structure of the thin filaments in sacromeres

globular actin units (G actin) forms a fiberous actin protein (F actin), two strands wrap around each other

F actin is connected to Z lines at one end and is capped at the other end by a protein to prevent degradation

tropomyosin is a filamentous protein that wraps arounf F actin

troponin is a three subunit protein placed along the thin filaments

19

discuss the structure of thick myosin filaments

myosin protein

consists of 2 heavy chains and 4 light chains
two light chains are associated with each hevay chain

20

what are the name of the receptors on the muscle membrane that bind to Ach from the the presynaptic knob

nicotinoc Ach receptors

21

describe what type of channel the nicotinic receptor is

a non selective channel that allows influx of Na, K, Ca