Question

1. Moderately repeated sequences are known to code for:

a. tRNAs
b. mRNAs
c. rRNAs
d. lipids
e. a,b,andc

2.

What process is generally thought to produce gene duplication?

a. equal crossing over
b. unequal crossing over
c. translation
d. Cut & paste transposons

e. Spliceosome

3.

The globin gene cluster contains stretches of DNA that are homologous to the sequences of functional globin genes but contain severe accumulated mutations that render them nonfunctional. Most of these noncoding regions have no known function. They are considered to be evolutionary relics and are called:

a. promoters
b. transposons c. pseudogenes d. proteins
e. introns

4.

DNA sequences in bacteria that on rare occasions moved from one place in the genome to another are called:

a. promoters
b. transposons c. pseudogenes d. proteins
e. introns

5.

What enzyme is required for movement of transposable elements that involve an RNA intermediate?

a. RNA polymerase
b. DNA polymerase
c. reverse transcriptase d. polyA polymerase
e. peptidyltransferase

Answer 1

1.c) rRNA

almost 20% to 80% of total DNA fraction is containing moderately repeating sequences and is they are coding for ribosomal RNAs.

2.b) unequal crossing over

During unequal crossing over a part of one chromatid is deleted and get replaced with a duplicated sequece from sister chromatid.

3.c) pseudogene

they are the copy of the functional gene and they share similarity in sequences with the original gene.

4.b.) transposons

transposons are DNA sequence which are able to change place within a particular genome.

5.a )RNA polymerase