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bms 300 > exam 1 > Flashcards

exam 1 Flashcards

1
Q

Two solutions are separated by a membrane containing only aquaporin channels. The left
compartment contains 30 millimolar NaCl, which dissociates completely The right compartment
contains 15 millimolar urea, which does not dissociate. Which of the following statements is correct?
a. water will not experience a net flow because the osmotic forces are balanced
b. water will flow from right to left because the osmotic concentration of NaCl is higher
c. water will flow from left to right because the osmotic concentration of urea is higher
d. water will flow from left to right because the osmotic concentration of NaCl is higher

A

water will flow from right to left because the osmotic concentration of NaCl is higher

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2
Q

The least stable organization of phospholipids is a:
a. planar lipid bilayer
b. micelle
c. liposome
d. all of the above

A

micelle

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3
Q

The most stable organization of phospholipids is a:
a. planar lipid bilayer
b. micelle
c. liposome
d. all of the above

A

planar lipid bilayer

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4
Q

Which of the following is NOT found in a nucleotide?
a. nitrogenous base
b. pentose sugar
c. phosphate
d. all of the above are present in a nucleotide

A

all of the above are present in a nucleotide

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5
Q

Which of the following is NOT found in a nucleoside?
a. nitrogenous base
b. pentose sugar
c. phosphate
d. all of the above are present in a nucleotide

A

phosphate

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6
Q

A toxin that blocks the ability of dynein to cleave ATP to ADP + Pi would disrupt the:

A

retrograde transport of vesicles on microtubules

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7
Q

The R groups of an integral protein that interact with the extracellular fluid are most likely:
a. hydrophilic
b. hydrophobic
c. amphipathic
d. phospholipids

A

hydrophilic

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8
Q

The R groups of an integral protein that interact with lipid bilayer are most likely:
a. hydrophilic
b. hydrophobic
c. amphipathic
d. phospholipids

A

hydrophobic

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9
Q

The R groups of an integral protein that interact with both lipid bilayer and the extracellular fluid are most likely:
a. hydrophilic
b. hydrophobic
c. amphipathic
d. phospholipids

A

amphipathic

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10
Q

Transcription factors bind to _____ in the promoter sequence to recruit the RNA polymerase.
a. start of the transcription site
b. 5’ cap
c. TATA box
d. primer

A

TATA box

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11
Q

Which of the following protects the mRNA from exonuclease digestion and permits the binding of
ribosomes?
a.poly-A tail
b. 5’cap
c. alternative splicing
d. introns

A

5’ cap

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12
Q

Which of the following protects the mRNA from exonuclease digestion and permits the splicing of different combinations of axons?
a.poly-A tail
b. 5’cap
c. alternative splicing
d. introns

A

alternative splicing

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13
Q

Which of the following organ systems is not required for the survival of an individual?
a. endocrine
b. integumentary
c. digestive
d. reproductive

A

reproductive

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14
Q

You have been jogging for 30-minutes at a relaxing pace. What substrates are you currently using to
make ATP?
a. creatine phosphate and glycogen
b. glucose and proteins
c. fats and glucose
d. fats and creatine phosphate

A

fats and glucose

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15
Q

During DNA replication, _____ acts specifically on the lagging strand to join the Okazaki fragments

A

DNA ligase

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16
Q

During DNA replication, _____ acts specifically to create RNA primer

A

DNA primer

17
Q

During DNA replication, _____ acts specifically to break H-bonds between base pairs

A

helicase

18
Q

Which carbon is linked to a nitrogenous base in the nucleotide?
a. 1
b. 2
c. 3
d. 5

A

1

19
Q

Which carbon is linked to a sugars in the nucleotide?
a. 1
b. 2
c. 3
d. 5

A

2

20
Q

Which carbon is linked to a phosphate in the nucleotide?
a. 1
b. 2
c. 3
d. 5

A

5

21
Q

Which polymerase is responsible for the production of tRNA?

A

RNA polymerase III

22
Q

SNARE complexes allow for exocytosis of vesicles. Which of the following proteins bind calcium ions?
a. SNAP-25
b. VAMP
c. syntaxin
d. synaptotagmin

A

synaptotagmin

23
Q

A person with an RQ value of 0.8 is most likely:
a. under starvation
b. using glucose as the substrate to make ATP
c. using fats as the substrate to make ATP
d. exercising vigorously

A

under starvation

24
Q

A mutated base that codes for a different amino acid is called a _____ mutation

A

missense

25
Q

A mutated base that changes codons after a mutation and shifts the reading frame is called a _____ mutation.

A

frameshift

26
Q

A mutated base that adds a base but doesn’t change is called a _____ mutation.

A

silent

27
Q

A mutated base that causes a stop codon is called a _____ mutation.

A

nonsense

28
Q

Misfolding of _____ can impair DNA unwinding during DNA replication.

A

helicase

29
Q

What is the first response of the ER when a misfolded protein is detected?

A

tag misfolded protein with ubiquitin

30
Q

Soap will reduce the _____ of water by disrupting hydrogen bonds

A

surface tension

bms 300 (6 decks)

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