What would be the result of a cytosine base being substituted for a thymine base in a DNA segment during DNA replication? (1 point)
The cytosine base would pair with adenine when the DNA was replicated.
The cytosine base would pair with adenine when the DNA was replicated.
The entire segment of DNA would be affected.
The entire segment of DNA would be affected.
The sequence could code for the wrong amino acid during translation.
The sequence could code for the wrong amino acid during translation.
There would be no effect on the DNA.
There would be no effect on the DNA.,
Question 2
A) Which statement is the first step of protein synthesis?(1 point)
Amino acids are linked together with peptide bonds.
Amino acids are linked together with peptide bonds.
DNA unzips between the base pairs.
DNA unzips between the base pairs.
tRNA carries amino acids to the ribosome and attaches them to the mRNA strand.
tRNA carries amino acids to the ribosome and attaches them to the mRNA strand.
A ribosome attaches to the mRNA.
A ribosome attaches to the mRNA.
Question 3
A) Which statement is true?(1 point)
tRNA is attached to specific proteins in the cell’s cytoplasm.
tRNA is attached to specific proteins in the cell’s cytoplasm.
Amino acids form a polypeptide chain via carbon-carbon bonds.
Amino acids form a polypeptide chain via carbon-carbon bonds.
Amino acids do not need to be assembled in a particular order.
Amino acids do not need to be assembled in a particular order.
The human body uses 20 amino acids to form all types of proteins.
The human body uses 20 amino acids to form all types of proteins.
Question 4
A) Which statement about cystic fibrosis is true?(1 point)
Cystic fibrosis is caused by a mutation in which a dominant allele replaces a recessive allele.
Cystic fibrosis is caused by a mutation in which a dominant allele replaces a recessive allele.
Carriers have an advantage over people who do not have the cystic fibrosis mutation.
Carriers have an advantage over people who do not have the cystic fibrosis mutation.
Cystic fibrosis affects a person’s ability to make normal red blood cells.
Cystic fibrosis affects a person’s ability to make normal red blood cells.
Cystic fibrosis is caused by a deletion of one codon in the DNA molecule.
Cystic fibrosis is caused by a deletion of one codon in the DNA molecule.
Question 5
A) What benefit does using the CRISPR technique have in creating GMOs?(1 point)
It eliminates all risk of mutation.
It eliminates all risk of mutation.
Diversity within species can continue to increase through crossbreeding.
Diversity within species can continue to increase through crossbreeding.
Precise traits can be chosen to produce viable organisms more quickly.
Precise traits can be chosen to produce viable organisms more quickly.
CRISPR can result in infertile hybrids.
CRISPR can result in infertile hybrids.
Question 6
A) What is the phenotype of a mouse that has the genotype Bb where B is the gene for black fur and b is the gene for brown fur assuming this gene follows a Mendelian inheritance pattern?(1 point)
fur with both black and brown hairs
fur with both black and brown hairs
fur with brown hairs
fur with brown hairs
fur with yellow hairs
fur with yellow hairs
fur with black hairs
fur with black hairs
Question 7
A) A tall, heterozygous pea plant is crossed with another tall, heterozygous pea plant. What is the probability that an offspring will be a short plant?(1 point)
75%
75%
0%
0%
25%
25%
50%
50%
Question 8
A) Which of the following mutations would be most likely to have a harmful effect on an organism?(1 point)
all mutations have a harmful effect on organisms
all mutations have a harmful effect on organisms
a substitution of a thymine for an adenine
a substitution of a thymine for an adenine
there is not enough information to know whether a mutation would be harmful
there is not enough information to know whether a mutation would be harmful
a deletion of 3 bases near the center of a gene
a deletion of 3 bases near the center of a gene
Question 9
A) Which statement best describes why Punnett squares are useful?(1 point)
Punnett squares are used to predict how recessive alleles are inherited.
Punnett squares are used to predict how recessive alleles are inherited.
Punnett squares are used to predict how dominant alleles are inherited.
Punnett squares are used to predict how dominant alleles are inherited.
Punnett squares are used to predict the most likely allele combinations of the parents in a cross.
Punnett squares are used to predict the most likely allele combinations of the parents in a cross.
Punnett squares are used to predict all possible allele combinations and their frequencies in offspring.
Punnett squares are used to predict all possible allele combinations and their frequencies in offspring.
2 answers
1 answer