Which of the following statements is true regarding ribosomes?
a. They are composed of two separate units, each made of rRNA combined with protein.
b. They are used to translate the mRNA sequence into a protein composed of amino acids.
c. They have three different tRNA binding sites
d. all of the above
e. a and b only- Voclasses
Why can transfer RNA be referred to as a “bridging” molecule?
a. It forms a chemical bridge between DNA and messenger RNA.
b. It creates the linkage between the base pairs of the double helix.
c. It links species through evolution.
d. It links ribosomes together.
e. It binds to both amino acids and messenger RNA.
In one form of genetic regulation, proteins called transcription factors bind to _____, thus facilitating the work of _____.
a. ribosomes ... transfer RNA
b. messenger RNA ... ribosomes
c. non-coding DNA sequences ... RNA polymerase
d. coding DNA sequences ... RNA polymerase
e. transfer RNA ... ribosomes- Voclasses
An intron is a sequence of ____ RNA that is ____ a primary transcript, while an exon is a sequence of ______ RNA that is ______ a primary transcript.
a. non-coding ... cut out of ... coding ... left in
b. transfer ... cut out of ... non-coding ... left in
c. coding ... left in ... non-coding ... cut out of
d. transfer ... left in ... transfer ... cut out of
e. non-coding ... left in ... coding ... left in- Voclasses