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J: Biochem > EOC Missed Qs > Flashcards

EOC Missed Qs Flashcards

1
Q

Lac operon type

A

Inducible: substrate dissociates repressor

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2
Q

What is the normal and induced states of lac operon?

A

Normal: off
On: lactose present, binds as allolactose to repressor, repressor dissociates, operator is free and transcription of genes can occur

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3
Q

Type of operon that TRP is

A

Repressible: substrate binds to repress or stop transcription

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4
Q

Normal and ON for TRP operson

A

Normally: on, low levels of Trp > transcription occurring
Off: high levels of Trp, dimerize and bind to operator to repress transcription

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5
Q

Where is the auditory cortex located?

A

Temporal lobe

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6
Q

What is the I band?

A

Actin only

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7
Q

What is the name of the Actin only section?

A

I band

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8
Q

What is the overlap section of actin and myosin?

A

A band

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9
Q

What is the A band showing?

A

Overlap of actin and mysoin

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10
Q

What is the H band?

A

Myosin only

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11
Q

What is the band with only myosin?

A

H band

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12
Q

Function of the spleen?

A

Storage of leukocytes

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13
Q

What is the classification of restriction enzyme?

A

Endonuclease: cleave nucleotides from the middle of segment

Vs exonuclease: cleaving end of chain

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14
Q

DNA vs cDNA template length?

A

DNA is longer, cDNA is shorter

  • cDNA developed from mRNA, only coding regions, no introns
  • complimentary to mRNA
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15
Q

Professional Antigen Presenting Cells (APCs)

A

MHC II: B cells, dendritic cells, macrophages

- lead to T-cell mediated immunity by presenting to adaptive system

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16
Q

What does LH surge cause:

17
Q

Ependymal

A

Cerebrospinal

18
Q

Astrocyte =

A

Support cells

19
Q

Pluripotent

A

Not natural in adults

20
Q

Totipotent

A

Normally found in embryo only

21
Q

net filtration

A

Passing into bowmans capsule

22
Q

Protease formation and location

Is it found in the saliva?

A

Not found in saliva

Chief cells in stomach secrete pepsinogen: cleaved to active pepsin (protease in gastric juice) with lowering of pH

23
Q

Development of secondary oocyte

A

Female birth: primary oocytes and halted in prophase I
Puberty: meiosis I completed, primary oocytes halted in metaphase II
Fertilization: primary oocytes complete meiosis II and become haploid secondary oocytes

24
Q

Embryo development stages

A

Morula (need moreee) > blastula (blast off) > gestural > neuralation

25
Q

HcG mimics what other hormone

A

Mimics LH: to maintain corpus luteum

26
Q

What is the slope of lineweaver-Burke plot?

J: Biochem (13 decks)

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