Bio 140 Chp3-- pre class

The hypothesis that, when life originated on Earth, a macromolecule other than DNA served in the role of information storage, and that this same macromolecule carried out catalysis, is called:

RNA world.

In a nucleotide, to which carbon in the sugar is the base attached?

1'

The bases in the non-template DNA strand of a particular prokaryotic gene include 10% of thymine. What percentage of the primary transcript synthesized from this gene is uracil?

10%

The central dogma of molecular biology states that information flows from:

DNA to RNA to protein.

Which statement is true about the structure of a double-stranded DNA molecule?

The diameter of a DNA molecule is the same along its entire length due to the specific complementary base pairing of the DNA nucleotides.

Which of the DNA molecules would be more stable under conditions of increasing temperature?

a DNA molecule that has more guanine and cytosine nucleotides

Alternative splicing means that:

different spliced forms contain different combinations of exons.

A polymerization reaction is made irreversible by:

hydrolysis of a pyrophosphate group.

Translation is the process by which:

ribosomes synthesize protein from information in an RNA molecule.

In prokaryotes, the processes of transcription and translation are said to be coupled, which means that:

they are connected in space and time.