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Bio Test Yourself
Terms in this set (20)
Why did researchers initially believe the genetic material was protein?
Proteins are more biochemically complex than DNA
Considering the components of a nucleotide, what component is always different when comparing nucleotides in a DNA strand or in an RNA strand?
Which of the following equations is appropriate when considering DNA base composition?
If the sequence of a segment of DNA is 5'-CGCAACTAC-3', what is the appropriate sequence for the opposite strand?
Of the following statements, which is correct when considering the process of DNA replication?
New DNA molecules are composed of one strand from the old molecule and one new strand.
Meselson and Stahl were able to demonstrate semiconservative replication in E. coli by
using isotopes of nitrogen to label the DNA and determining the relationship of old and new DNA strands by density differences of the new molecules
During replication of a DNA molecule, the daughter strands are not produced in exactly the same manner. One strand, the leading strand, is made toward the replication fork, while the lagging strand is made in fragments in the opposite direction. This difference in the synthesis of the two strand is the result of which of the following?
The two template strands are antiparallel, and DNA polymerase makes DNA only in the 5' to 3' direction.
In eukaryotic cells, chromosomes consist of
DNA and proteins
A nucleosome is
a structure composed of DNA wrapped around eight histones
The conversion of euchromatin into heterochromatin involves
a greater compaction of loop domains
Which of the following best represents the central dogma of gene expression?
During transcription, DNA codes for mRNA, which codes for polypeptides during translation.
Transcription of a gene begins at a site on DNA called_______ and ends at a site on DNA known as ___________.
a promoter, the terminator
The functional product of a structural gene is
During eukaryotic RNA processing, the non translated sequences that are removed are called
The _______ is the site where the translation process takes place.
The small subunit of a ribosome is composed of
many proteins and one rRNA molecule
The region the tRNA that is complementary to a codon in mRNA is
During the initiation of translation, the first codon, _____, enters the ________and associates with the initiator tRNA.
AUG, P site
The movement of the polypeptide from the tRNA in the P site to the tRNA in the A site is referred to as
the peptidyl transfer reaction
The synthesis of a polypeptide occurs during which stage of translation?
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