15. Gene Expression

Which component is not directly involved in translation?

a. GTP

b. DNA

c. tRNA

d. ribosomes

Translation results in the production of ________.

a. RNA

b. DNA

c. Protein

d. Individual amino acids

e. Transfer RNA molecules

Within a cell, the amount of protein made using a given mRNA molecule depends partly on

a. The degree of DNA methylation

b. The rate at which the mRNA is degraded

c. The number of introns present in the mRNA

d. The types of ribosomes present in the cytoplasm

Controlling the rates of transcription and translation is important in bacteria to avoid collisions between ribosomes and RNA polymerases. Calculate what the maximum rate of translation by a ribosome in a bacterial cell would have to be, in units of amino acids per second, so as not to overtake an RNA polymerase that is synthesizing mRNA at a rate of 60 nucleotides per second. How long would it take for this bacterial cell to translate an mRNA containing 1800 codons?

Which component is directly involved in translation?

A. RNA polymerase

B. ribosome

C. spliceosome

D. DNA