BIO 148 Exam 2 uky Questions With Correct
Answers
What do activators do? - CORRECT ANSWER✔✔-turn on transcription at the time
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& location the mRNA needs to be made
| | | | | | |
Where do point mutations usually occur? - CORRECT ANSWER✔✔-the promoter
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(which typically alters amount of gene expression)
| | | | | |
What is created from mutations? - CORRECT ANSWER✔✔-alleles, which creates
| | | | | | | | | |
new proteins & a new phenotype
| | | | |
Point mutation - CORRECT ANSWER✔✔-gene mutation in which a single base pair
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in DNA has been changed
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When do mutations occur? - CORRECT ANSWER✔✔-during DNA replication
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Silent mutation - CORRECT ANSWER✔✔-A mutation that changes a single
| | | | | | | | | |
nucleotide, but does NOT change the amino acid created | | | | | | | |
Missense mutation - CORRECT ANSWER✔✔-A base-pair substitution that results
| | | | | | | | |
in a codon that codes for a different amino acid
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, Nonsense mutation - CORRECT ANSWER✔✔-A mutation that changes an amino
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acid codon to 1 of the 3 stop codons, resulting in a shorter and usually
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nonfunctional protein "STOP that nonsense!" | | | |
How many tRNA bonding sights do ribosomes have? - CORRECT ANSWER✔✔-3
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tRNA - CORRECT ANSWER✔✔-an adapter molecule that holds acids in place,
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posses anticodons that base pair w/ mRNA (antiparallel, complementary)
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5 features of genetic code - CORRECT ANSWER✔✔-1. Redundant (> 1 codon/acid)
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2. Unambiguous (1 codon= 1 acid)
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3. Non-overlapping (after AUG, reads every 3 bases)
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4. Nearly universal (all use ATCG)
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5. Conservative (when several codons code for the same acid the first 2 bases are
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identical)
Genetic code is - CORRECT ANSWER✔✔-redundant
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Two distantly related species (like a cow and a yeast) will: - CORRECT
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ANSWER✔✔-have many genes that differ b/w the two species | | | | | | | |
Two members of same species will: - CORRECT ANSWER✔✔-share all the same
| | | | | | | | | | | |
genes, but may contain different alleles
| | | | |
Answers
What do activators do? - CORRECT ANSWER✔✔-turn on transcription at the time
| | | | | | | | | | | |
& location the mRNA needs to be made
| | | | | | |
Where do point mutations usually occur? - CORRECT ANSWER✔✔-the promoter
| | | | | | | | | |
(which typically alters amount of gene expression)
| | | | | |
What is created from mutations? - CORRECT ANSWER✔✔-alleles, which creates
| | | | | | | | | |
new proteins & a new phenotype
| | | | |
Point mutation - CORRECT ANSWER✔✔-gene mutation in which a single base pair
| | | | | | | | | | |
in DNA has been changed
| | | | |
When do mutations occur? - CORRECT ANSWER✔✔-during DNA replication
| | | | | | | |
Silent mutation - CORRECT ANSWER✔✔-A mutation that changes a single
| | | | | | | | | |
nucleotide, but does NOT change the amino acid created | | | | | | | |
Missense mutation - CORRECT ANSWER✔✔-A base-pair substitution that results
| | | | | | | | |
in a codon that codes for a different amino acid
| | | | | | | | |
, Nonsense mutation - CORRECT ANSWER✔✔-A mutation that changes an amino
| | | | | | | | | |
acid codon to 1 of the 3 stop codons, resulting in a shorter and usually
| | | | | | | | | | | | | | |
nonfunctional protein "STOP that nonsense!" | | | |
How many tRNA bonding sights do ribosomes have? - CORRECT ANSWER✔✔-3
| | | | | | | | | |
tRNA - CORRECT ANSWER✔✔-an adapter molecule that holds acids in place,
| | | | | | | | | | |
posses anticodons that base pair w/ mRNA (antiparallel, complementary)
| | | | | | | |
5 features of genetic code - CORRECT ANSWER✔✔-1. Redundant (> 1 codon/acid)
| | | | | | | | | | |
2. Unambiguous (1 codon= 1 acid)
| | | | |
3. Non-overlapping (after AUG, reads every 3 bases)
| | | | | | |
4. Nearly universal (all use ATCG)
| | | | |
5. Conservative (when several codons code for the same acid the first 2 bases are
| | | | | | | | | | | | | | |
identical)
Genetic code is - CORRECT ANSWER✔✔-redundant
| | | | |
Two distantly related species (like a cow and a yeast) will: - CORRECT
| | | | | | | | | | | | |
ANSWER✔✔-have many genes that differ b/w the two species | | | | | | | |
Two members of same species will: - CORRECT ANSWER✔✔-share all the same
| | | | | | | | | | | |
genes, but may contain different alleles
| | | | |
