DNA-Replication-Transcription-Translation

During translation, the ____ site within the ribosome hold the growing amino acid chain while the ____ site holds the next amino acid to be added to the chain.

• A, P

• P, A

• A, B

• B, A

If one strand of DNA has the sequence TTACCG, the sequence of the mRNA will be

• AAUGGC

• TTACCG

• AACGGC

• AATGGG

Once replication in a DNA molecule is complete, each new DNA molecule contains

• two new strands.

• 3 exact copies of strands.

• one new strand and one old.

• two old strands.

Transcription occurs along a ____ template forming an mRNA in the ____ direction.

• 5' to 3'; 5' to 3'

• 5' to 3'; 3' to 5'

• 3' to 5'; 5' to 3'

• 3' to 5'; 3' to 5'

Which of the statements below is false?

• The genetic code is overlapping

• The genetic code is universal.

• Degenerate codons specify the same amino acids.

• The genetic code is triplet.

The first mRNA codon to specify an amino acid is always

• TAC

• UAA

• UAG

• AUG

Transcription and translation of a gene composed of 30 nucleotides would form a protein containing no more than ___ amino acids.

• 10

• 15

• 20

• 30

A geneticist isolates a gene for a specific trait under study. She also isolates the corresponding mRNA. Upon comparison, the mRNA is found to contain 1,000 fewer bases than the DNA sequence. Did the geneticist isolate the wrong DNA?

• yes, mRNA is made from a DNA template and should be the same length as the gene sequence

• yes, the mRNA should contain more bases than the DNA sequence because bases flanking the gene are also transcribed

• no, the final mRNA contains only exons, the introns were removed

• no, the mRNA was partially degraded after it was transcribed

The effort to decipher the genetic code was led by ____ who was awarded a Nobel Prize for his work.

• Nirenberg

• Lederberg

• Watson

• Crick

The transcribing enzyme is

• ligase.

• DNA polymerase.

• RNA polymerase.

• amino-acyl transferase.