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WorksheetsBio A U6 Review
Total questions: 15
Worksheet time: 7mins
What would be the result of a cytosine base being substituted for a thymine base in a DNA segment during DNA replication?
The cytosine base would pair with adenine when the DNA was replicated.
The sequence could code for the wrong amino acid during translation.
The entire segment of DNA would be affected.
There would be no effect on the DNA.
Which statement is the first step of protein synthesis?
DNA unzips between the base pairs.
Amino acids are linked together with peptide bonds.
A ribosome attaches to the mRNA.
Which statement is true?
tRNA is attached to specific proteins in the cell’s cytoplasm.
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.
Which statement about cystic fibrosis is true?
Cystic fibrosis is caused by a mutation in which a dominant allele replaces a recessive allele.
Cystic fibrosis is caused by a deletion of one codon in the DNA molecule.
Cystic fibrosis affects a person’s ability to make normal red blood cells.
What benefit does using the CRISPR technique have in creating GMOs?
Precise traits can be chosen to produce viable organisms more quickly.
Diversity within species can continue to increase through crossbreeding.
It eliminates all risk of mutation.
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?
fur with black hairs
fur with yellow hairs
fur with brown hairs
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?
0%
25%
50%
75%
Which of the following mutations would be most likely to have a harmful effect on an organism?
there is not enough information to know whether a mutation would be harmful
a substitution of a thymine for an adenine
all mutations have a harmful effect on organisms
Which statement best describes why Punnett squares are useful?
Punnett squares are used to predict how dominant alleles are inherited.
Punnett squares are used to predict all possible allele combinations and their frequencies in offspring.
Punnett squares are used to predict how recessive alleles are inherited.
How are new viruses made?
asexual reproduction
viral DNA or RNA copied by a host cell
sexual reproduction
Compare and contrast a provirus and viral DNA.
A provirus is viral DNA incorporated into the host cell’s DNA.
A provirus is bacterial DNA incorporated into the viral DNA.
A provirus is newly replicated viral DNA after injection.
Why is the common cold virus difficult to cure in humans?
It is a spherical-shaped virus with many protein receptors.
It possesses a viral genome that mutates very quickly.
It is caused by a special type of virus called a retrovirus.
What function makes the HIV virus unique?
It has viral DNA that is transmitted through indirect contact with infected persons
It copies the information for reproduction from RNA back into DNA.
It attacks neurons in the nervous system and causes paralysis.
Click the letter p as quickly as possible
p
q
q
q
Click the number 3 as quickly as possible
3
8
8
8
