Reading Quiz #8

The experimental design of Beadle and Tatum's study was used to examine what?

the relationship between genetic changes and metabolic enzymes

In producing a genomic library, human DNA and plasmid DNA must first be treated with:

the same restriction enzyme

In the Beadle and Tatum study, it was important that Neurospora was haploid because:

a mutation that arises is not masked by a normal allele on a homologous chromosome

Which of the following nucleotide sequences represents the complement to the DNA strand 5′−AGATCCG-3′?

3'−TCTAGGC-5′

Retroviruses, such as RNA tumor viruses, use __________ to make DNA from their RNA genomes.

reverse transcriptase

How is a bacterial (prokaryote) chromosome replicated?

the circular DNA molecule is replicated from one origin of replication bidirectionally

Before the 1940s, scientists believed that proteins, rather than DNA, were the carriers of genetic material in the cell. Why?

the large number of possible amino acid combinations

What is false about DNA?

the sugar present in DNA is ribose

One of the mRNA codons specifying the amino acid leucine is 5′-CUA-3′. Its corresponding anticodon is:

3'-GAU-5'

The wobble hypothesis states that:

certain tRNA anticodons can pair with more than one codon sequence

Frameshift mutations result from the:

insertion or deletion of one or two base pairs