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Question
The two major phospholipids on the outer leaflet of erythrocytes are:a. phosphatidylcholine and phosphatidylethanolamine.
b. phosphatidylcholine and sphingomyelin.
c. phosphatidylethanolamine and sphingomyelin.
d. phosphatidylserine and sphingomyelin.
e. phosphatidylcholine and phosphatidylserine.
Answer
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Related questions
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In general, proteins whose folding is chaperone-dependent start the folding process first with ____ and then are passed as ____ folded intermediates to ____.
a. Hsp40; un-; Hsp70
b. Hsp90; un-; chaperonin
c. Hsp70; partially; chaperonin
d. Hsp40; partially; Hsp70
e. Hsp60; partially; Hsp40
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Which of the following is responsible for Alzheimer's disease?
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Q:
In a class I aminoacyl-tRNA synthetase, which of the following reacts with the acyl phosphate formed during the reaction of ATP with the amino acid?a. 5'-hydroxyl of the nucleotide on the 5' end of the tRNA moleculeb. 3'-hydroxyl of the nucleotide on the 5' end of the tRNA moleculec. 2'-hydroxyl of the nucleotide on the 5' end of the tRNA moleculed. 3'-hydroxyl of the nucleotide on the 3' end of the tRNA moleculee. 2'-hydroxyl of the nucleotide on the 3' end of the tRNA molecule
Q:
Each of the following statements regarding ways in which eukaryotic protein synthesis differs from prokaryotic protein synthesis is true EXCEPT:
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b. prokaryotes use a 30S small ribosomal subunit, while eukaryotes use a 40S small ribosomal subunit
c. prokaryotic and eukaryotic translation initiation differ significantly in mechanism and process
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Q:
Ribosome:mRNA:P-site tRNA complex, with the help of ____, is disassembled by ____ which is an excellent molecular mimic of a(n) ____.
a. ATP; tRNA terminator; GTP
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Q:
Termination of translation in prokaryotic cells requires:
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b. interaction of release factors with the termination codon.
c. ternary interaction of the release factor and the termination tRNA with the termination codon.
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Q:
Which of the following does not reqire GTP hydrolysis?
a. the formation of the initiation complex (translationally active 70 S ribosome complex).
b. the binding of the aminoacyl tRNA to the A site during elongation
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Q:
Which of the following statements is true regarding the formylmethionine that serves as the first amino acid in bacterial protein synthesis?
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Q:
Mitochondrial and chloroplastic ribosomes resemble ____ ribosomes.
a. prokaryotic
b. lower eukaryotic
c. higher eukaryotic
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Q:
Ribosomal proteins are typically rich in the amino acids ____ and ____ to interact with ____ RNAs.
a. asp; glu; polycationic
b. asp; ala; polycationic
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Q:
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Q:
All members of a set of tRNAs specific for a particular amino acid - termed ____ tRNA - are served by one ____.
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Q:
Which of the following is/are true regarding the genetic code?
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Q:
The genetic code is said to be degenerate, which means that:
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b. An anticodon can interact with more than one codon in the mRNA in which the codon may differ in any or all of the three nucleotides.
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Q:
The linkage between the amino acid and the tRNA in an amino-acyl tRNA complex is:
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Q:
The araBAD operon allows for the use of what metabolite by E. coli?
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Q:
Spliceosomes include all of the following EXCEPT:
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Q:
Transcription of a typical gene encoding a polypeptide in eukaryotes involves all of the following EXCEPT:
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Q:
The base-pair edges in the ____ groove act as a(n) ____ identifiable through ____ with specific proteins.
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Q:
The eukaryotic transcription factor that exhibits a sequence specificity for the TATA box is:
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Q:
All are correct about enhancer sequences in eukaryotic cells EXCEPT:
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Q:
All are characteristics of catabolic activator protein (CAP) EXCEPT:
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Q:
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Q:
Which of the following would most likely cause a frameshift mutation?
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b. a base analog such as 5-bromouracil
c. a chemical mutagen such as nitrous acid
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Q:
Which of the following statements explains why the adenine analog, 2-aminopurine (2-AP), can cause mutations in DNA when it is inserted in place of a site normally occupied by A?
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e. none of the above
Q:
Misincorporation of all subsequent amino acids results from ____ mutations.
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Q:
Mutations in DNA may result from all of the following EXCEPT:
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b. physical insults on the cell, such as UV light.
c. errors in transcription.
d. chemical mutagens.
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Q:
A transition mutation would be replacing A by:
a. T.
b. C.
c. U.
d. G.
e. either T or C