protein synthesis 2

[william]

fill in the blank.

1. endonucleases in the cytoplasm will destroy any RNA that does not have

a)a 3' poly-A tail and 5' cap b) start codon c) spliceosome d) introns e) exons

2. which of the following statements about tRNA is true?

a) aminoacyl-tRNA synthetase uses amino acids to form tRNA
b) tRNA transports amino acids to the replicated DNA strand
c) the anti-codon of tRNA binds directly to the amino acid it codes for
d) an amino acid tRNA complex binds to the A-site of a ribosome during initiation
e) tRNA that is associated with proteins makes up a ribosome

3. select the answer where three of the events of gene expression are presented in the correct order (earliest to later)

a) ribosome binds to mRNA; DNA is transcribed into mRNA by RNA polymerase; operon is activated
b) ribosome binds to mRNA;polypeptide chain elongates,mRNA translated to tRNA
c)tRNA attatches to amino acid;tRNA is released from E-site;mRNA is bound to ribosome
d) mRNA transcript is made;RNA polymerase attatches to DNA;ribosome attatches to mRNA
e) RNA polymerase attatches to DNA; mRNA transcript is made; ribosome attatched to mRNA

[TheMasterMind]

fill in the blank.

1. endonucleases in the cytoplasm will destroy any RNA that does not have

a)a 3' poly-A tail and 5' cap b) start codon c) spliceosome d) introns e) exons

2. which of the following statements about tRNA is true?

a) aminoacyl-tRNA synthetase uses amino acids to form tRNA
b) tRNA transports amino acids to the replicated DNA strand
c) the anti-codon of tRNA binds directly to the amino acid it codes for
d) an amino acid tRNA complex binds to the A-site of a ribosome during initiation
e) tRNA that is associated with proteins makes up a ribosome

3. select the answer where three of the events of gene expression are presented in the correct order (earliest to later)

a) ribosome binds to mRNA; DNA is transcribed into mRNA by RNA polymerase; operon is activated
b) ribosome binds to mRNA;polypeptide chain elongates,mRNA translated to tRNA
c)tRNA attatches to amino acid;tRNA is released from E-site;mRNA is bound to ribosome
d) mRNA transcript is made;RNA polymerase attatches to DNA;ribosome attatches to mRNA
e) RNA polymerase attatches to DNA; mRNA transcript is made; ribosome attatched to mRNA
1. a/ the particular post transcriptional modifications are added to protect the mRNA transcript from being degraded by cytoplasmic enzymes

2.a/

3. e/ Note: mRNA transcript is made during transcription, the ribosome attaching to the mRNA transcript is the beginning or translation