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BSC 108 EXAM #3 – QUESTIONS &
SOLUTIONS (100%)
Question : structure of DNA
CORRECT ANSWER : composed of nucleotide sub
units - has sugar - phosphate backbone (deoxyribose and phosphate)
Question : DNA
CORRECT ANSWE R: deoxyribosenucleic acid
Question : nitrogen - containing bases
CORRECT ANSWER : adenine, guanine, thymine,
cytosine
Question : adenine, guanine, thymine, cytosine
CORRECT ANSWER : held together by hydrogen bonds
Question : adenine = thymine guanine = cytosine
CORRECT ANSWER : always pair together (DNA)
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Question : DNA replication
CORRECT ANSWER : - 1 parent has 2 strands of
separates -each strand used to make new strand - 2 daughter molecules is composed of 1 "old"/ "new" strand
Question : origin
CORRECT ANSWER : 2 parent strands separate at
________ of replication
Question : RNA
CORRECT ANSWER : single stand nucleic acid
Question : uracil, ribose
CORRECT ANSWER : RNA contains ________ instead
of thymine and ________ instead of deoxydie
Question : mRNA, tRNA, rRna
CORRECT ANSWER : 3 types of RNA
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Question : mRNA (messenger)
CORRECT ANSWER : carries genetic info copied from
DNA
Question : tRNA (transfers)
CORRECT ANSWER : deciphering code words
Question : rRNA (ribosomes)
CORRECT ANSWER : translation of cells use to make
protein
Question : gene codes/ specific proteins
CORRECT ANSWER : transcription, translation
Question : synthesis of mRNA
CORRECT ANSWER : transcription takes place in
nucleus --> under DNA
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Question : DNA --> RNA
CORRECT ANSWER : transcription
Question : RNA -->protein
CORRECT ANSWER : translation
Question : mutation
CORRECT ANSWER : change in genetic material
(based on 1 pair), change genes protein, change in DNA causes altered mRNA (different amino acids added to polypeptide chain)
Question : frameshift mutations
CORRECT ANSWER : does not fix the addition or
deletion