UNCW BIO 201 Exam 3 Questions With Complete Solutions
5' Capping Correct Answers Modified guanine nucleotide
added to 5' end.
Prevents degradation by exonuclease in the cytoplasm.
Regulates nuclear export.
Promotes translation.
Alfred Hershey and Martha Chase Correct Answers Viral DNA
can program cells (1952)
Infected E. coli bacteria with two labeled phage.
32 P discovered in bacteria and progeny stages.
35 S not in the bacteria but released with phage ghosts.
Found DNA, not proteins, are the genetic material.
Alleles Correct Answers The alternative forms that genes can
exist in.
Amino Acid Activation Correct Answers Matches tRNAs with
their correct aa.
Binds to aminoacyl-tRNA synthetase because the amino acid-
binding pocket is specific to one of the 20 amino acids.
,ATP is the energy source.
A specific tRNA binds to the aminoacyl-tRNA synthetase
because the tRNA-binding pocket is specific to one of the 61
tRNA anticodons.
Charged tRNA is released.
Anatomy of a Gene Correct Answers Promoter: Where RNA
Polymerase lands on the DNA.
Regulatory Sequences: Where proteins (transcription factors)
bin to orient RNA Polymerase onto the promoter.
Terminator: Sequences that signal the end of a gene.
Bacteria DNA Replication Correct Answers Circular bacterial
chromosome
DNA strands unwind, and DNA replication begins.
DNA replication is completed.
Single origin of replication. One Chromosome.
Bacteriophage Correct Answers Virus that attacks bacteria and
replicates by invading a living cell and using the cell's molecular
machinery.
Composed of DNA genome without proteins and a protein
capsule.
, Cellular Energy Transfer Correct Answers Atp --> ADP
Chromosome Erosion Correct Answers Loss of bases at 5' ends
in every replication.
Chromosomes get shorter with each replication.
Chromosome Theory of Inheritance Correct Answers Boveri
and Sutton 1904
Based on observations of meiotic cells.
Chromosomes are passed from one generation to the next aka
inheritance.
Chromosomes Correct Answers Two Types: Autosomes
(Homologous), Sex Chromosomes
Different organisms have different amounts. (Humans have 23,
22 autosomal)
Eukaryotic organisms are diploid, have maternal and paternal
chromosomes.
Code is Triplet/Degenerate Correct Answers Most amino acids
may be coded for by more than one codon.
Nearly universal.
5' Capping Correct Answers Modified guanine nucleotide
added to 5' end.
Prevents degradation by exonuclease in the cytoplasm.
Regulates nuclear export.
Promotes translation.
Alfred Hershey and Martha Chase Correct Answers Viral DNA
can program cells (1952)
Infected E. coli bacteria with two labeled phage.
32 P discovered in bacteria and progeny stages.
35 S not in the bacteria but released with phage ghosts.
Found DNA, not proteins, are the genetic material.
Alleles Correct Answers The alternative forms that genes can
exist in.
Amino Acid Activation Correct Answers Matches tRNAs with
their correct aa.
Binds to aminoacyl-tRNA synthetase because the amino acid-
binding pocket is specific to one of the 20 amino acids.
,ATP is the energy source.
A specific tRNA binds to the aminoacyl-tRNA synthetase
because the tRNA-binding pocket is specific to one of the 61
tRNA anticodons.
Charged tRNA is released.
Anatomy of a Gene Correct Answers Promoter: Where RNA
Polymerase lands on the DNA.
Regulatory Sequences: Where proteins (transcription factors)
bin to orient RNA Polymerase onto the promoter.
Terminator: Sequences that signal the end of a gene.
Bacteria DNA Replication Correct Answers Circular bacterial
chromosome
DNA strands unwind, and DNA replication begins.
DNA replication is completed.
Single origin of replication. One Chromosome.
Bacteriophage Correct Answers Virus that attacks bacteria and
replicates by invading a living cell and using the cell's molecular
machinery.
Composed of DNA genome without proteins and a protein
capsule.
, Cellular Energy Transfer Correct Answers Atp --> ADP
Chromosome Erosion Correct Answers Loss of bases at 5' ends
in every replication.
Chromosomes get shorter with each replication.
Chromosome Theory of Inheritance Correct Answers Boveri
and Sutton 1904
Based on observations of meiotic cells.
Chromosomes are passed from one generation to the next aka
inheritance.
Chromosomes Correct Answers Two Types: Autosomes
(Homologous), Sex Chromosomes
Different organisms have different amounts. (Humans have 23,
22 autosomal)
Eukaryotic organisms are diploid, have maternal and paternal
chromosomes.
Code is Triplet/Degenerate Correct Answers Most amino acids
may be coded for by more than one codon.
Nearly universal.
