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Biol 2320 LECTURE EXAM 2 Review updated already passed
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Biol 2320 LECTURE EXAM 2 Review updated already passed
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Biol 2320 LECTURE EXAM 2 ReviewWhich of the following statements about mutations is false? - correct answer ✔✔Multicellular organisms
evolve faster than unicellular organisms.
Which of the following nitrogen bases is found only in RNA and NOT in DNA? - correct answer ✔✔uracil
Gyrase breaks the hydrogen bonds between DNA strands and unwinds the DNA strands while
topoisomerases relieve the coiling tension that develops as the helix unwinds. - correct answer ✔✔False
Which of the following statements about protein synthesis is false? - correct answer ✔✔Protein
synthesis has two main stages: replication and transcription.
Where can the DNA of prokaryotic cells be found? - correct answer ✔✔Nucleoid
A ________ mutation does not change the amino acid sequence of a protein. - correct answer ✔✔Silent
The primary flow of genetic information in cells is from - correct answer ✔✔DNA → RNA → protein.
Naturally occurring mutations are often referred to as ________ mutations. - correct answer
✔✔Spontaneous
Which of the following statements about the lagging strand is false? - correct answer ✔✔It uses only
one molecule of DNA polymerase I.
Which of the following statements about thymine dimers is false? - correct answer ✔✔They are repaired
by one enzyme that can clip out, lay down new nucleotides, and seal the gap.
____ RNA carries a genetic message intriplet code (codons) and is translated to build a protein. - correct
answer ✔✔Messenger
, An organism's genotype influences its phenotype. - correct answer ✔✔True
Which of the following statements about plasmids is false? - correct answer ✔✔If present, plasmids are
always essential to cell survival
Key mechanisms of horizontal gene transfer include all of the except - correct answer ✔✔Reproduction
Which of the following terms is correctly matched with its description - correct answer ✔✔Insertion
mutations: Occur when a cell adds one or more nucleotides to its genome sequence
___ Mutagens are agents that can introduce genetic change through recombination - correct answer
✔✔Biological
Which of the following statements about conjugation is false? - correct answer ✔✔Conjugation is sexual
reproduction for bacteria
Which of the following terms refers to the genetic makeup of an organism? - correct answer
✔✔Genotype
A reversion mutation is when a base-substitution mutation is changed back to the original DNA
sequence. - correct answer ✔✔False
Which of the following terms is correctly matched with its description? - correct answer ✔✔Insertion
mutations: Occur when a cell adds one or more nucleotides to its genome sequence
Which of the following statements about transcription in prokaryotes is false? - correct answer ✔✔It
occurs in the nucleus.
Helicase - correct answer ✔✔unwinds the DNA.
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