Biology 103 Chapter 7
Terms in this set (31)
The scientist (scientists) who confirmed DNA was the genetic information by working with bacteria that infect viruses is (are)
Hershey and Chase.
The scientist (scientists) who showed that DNA contained equal amounts of certain nitrogen bases is (are)
The scientist (scientists) who used X-ray diffraction to help reveal the geometric structure of DNA is (are)
Wilkins and Franklin.
The scientist (scientists) who was (were) given credit for first determining the molecule structure of DNA by building a ball-and-stick model is (are)
Watson and Crick
The twisted ladder shape of DNA is a result of the covalently bonded building blocks called
The DNA subunits that form the "rungs" joining the two sides of the DNA molecule are formed by
hydrogen bonds between nitrogen base pairs.
The "twisted ladder" shape of a DNA molecule results from
cytosine pairing with thymine.
adenine pairing with uracil.
----adenine pairing with thymine.
thymine pairing with uracil.
cytosine pairing with adenine.
Purine bases have a _________ ___________ structure.
The "Central Dogma" refers to
the flow of genetic information in cells, from DNA genes to specific proteins.
The statement that does not correctly associate an RNA type, and its function, is
complementary RNA reorders the amino acids to insure their correct sequence.
Transcription and replication occur during ____________________ of the cell cycle.
A DNA sequence that signals a gene's start is a(n)
In eukaryotic cells, sequences of mRNA that are removed from an mRNA molecule before being translated are
The process used by cells to convert the mRNA "message" into a sequence of amino acids is
A three-base sequence (loop) in tRNA that is complementary to a sequence of three bases in mRNA is a(n)
A tRNA molecule is "bilingual" because it binds to
codons of mRNA and to amino acids.
The step of translation in which an mRNA, a small ribosomal subunit, and the initiator tRNA are aligned together is
The step of translation in which release factors bind to a stop codon is
In the Lac operon, the protein that binds to the operator to prevent transcription is
Which proteins initiate transcription in eukaryotes by recognizing sequences within the promoter region of a gene and attracting RNA polymerase?
A change in a cell's DNA sequence is
In a "silent" mutation the
codon that mutates does not cause a change in the amino acid specified.
A germline mutation occurs in cells that give rise to
If the DNA in a cell consists of 20% A, it will be ___ G.
The DNA sequence 5'-ATCGTACG-3' will pair with which of the following DNA strands?
The DNA sequence 5'-ATCGATCG-3' will pair with which of the following RNA strands?
What would be the first codon translated in the mRNA sequence
If E. coli bacteria are grown in the presence of lactose, then the repressor will
not bind the operator allowing transcription of the lac operon genes.
If E. coli bacteria are grown in the absence of lactose, then the repressor will
bind the operator preventing transcription of the lac operon genes.
Which mutation in DNA would lead to the change of a single amino acid in a protein?
a missense mutation
The 5' and 3' designations used in reference to DNA and RNA sequences are assigned to the
carbon atoms of deoxyribose and ribose.