Question 1
A) 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 entire segment of DNA would be affected.
There would be no effect on the DNA.
The cytosine base would pair with adenine when the DNA was replicated.
The sequence could code for the wrong amino acid during translation.
Question 2
A) Which of the following best explains why a cell spends most of the time during the cell cycle in interphase?(1 point)
Growth of the cell and replication of DNA prepare the cell for division.
Interphase is the last stage before exiting the cell cycle.
Mitosis happens during this phase where the cell divides.
Protein synthesis reads each codon carefully to ensure accuracy.
Question 3
A) Which statement is the first step of protein synthesis?(1 point)
DNA unzips between the base pairs.
A ribosome attaches to the mRNA.
Amino acids are linked together with peptide bonds.
tRNA carries amino acids to the ribosome and attaches them to the mRNA strand.
Question 4
A) Which statement is true?(1 point)
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.
Amino acids form a polypeptide chain via carbon-carbon bonds.
tRNA is attached to specific proteins in the cell’s cytoplasm.
Question 5
A) Which statement about cystic fibrosis is true?(1 point)
Cystic fibrosis affects a person’s ability to make normal red blood cells.
Carriers have an advantage over people who do not have the cystic fibrosis mutation.
Cystic fibrosis is caused by a frameshift deletion of one codon in the DNA molecule.
Cystic fibrosis is caused by a mutation in which a dominant allele replaces a recessive allele.
Question 6
A) What benefit does using the CRISPR technique have in creating GMOs?(1 point)
Diversity within species can continue to increase through crossbreeding.
CRISPR can result in infertile hybrids.
Precise traits can be chosen to produce viable organisms more quickly.
It eliminates all risk of mutation.
Question 7
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 black hairs
fur with yellow hairs
fur with both black and brown hairs
fur with brown hairs
Question 8
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%
50%
25%
0%
Question 9
A) Which of the following mutations would be most likely to have a harmful effect on an organism?(1 point)
an insertion of a cytosine base near the start of an exon
a substitution of a thymine for an adenine
a deletion of 3 bases near the center of a gene
a deletion of a guanine base near the center of an intron
Question 10
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 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 the most likely allele combinations of the parents in a cross.
10 - Punnett squares are used to predict all possible allele combinations and their frequencies in offspring.
3-DNA unzips between the base pairs.
What’s the answers ?
Can you post the answer’s oompa loompa
?what were the answers
To answer the questions, we'll go through each question and explain how to arrive at the correct answer.
Question 1: What would be the result of a cytosine base being substituted for a thymine base in a DNA segment during DNA replication?
To answer this question, we need to understand the pairing of bases in DNA. Cytosine (C) normally pairs with guanine (G), and thymine (T) pairs with adenine (A). During DNA replication, if a cytosine base is substituted for a thymine base, the cytosine will now pair with guanine instead of adenine. The correct answer, therefore, is "The cytosine base would pair with adenine when the DNA was replicated."
Question 2: Which of the following best explains why a cell spends most of the time during the cell cycle in interphase?
To answer this question, we need to understand the purpose of interphase in the cell cycle. Interphase is the phase where the cell grows and replicates its DNA in preparation for division. The correct answer, therefore, is "Growth of the cell and replication of DNA prepare the cell for division."
Question 3: Which statement is the first step of protein synthesis?
To answer this question, we need to know the order of events in protein synthesis. The first step is the unzipping of the DNA between the base pairs. The correct answer, therefore, is "DNA unzips between the base pairs."
Question 4: Which statement is true?
To answer this question, we need to understand the formation of proteins. Proteins are formed by linking amino acids together with peptide bonds. The correct answer, therefore, is "Amino acids are linked together with peptide bonds."
Question 5: Which statement about cystic fibrosis is true?
To answer this question, we need to know the characteristics of cystic fibrosis. Cystic fibrosis is caused by a mutation in which a recessive allele replaces a dominant allele. The correct answer, therefore, is "Cystic fibrosis is caused by a mutation in which a recessive allele replaces a dominant allele."
Question 6: What benefit does using the CRISPR technique have in creating GMOs?
To answer this question, we need to understand the advantages of using CRISPR in genetic engineering. The CRISPR technique allows for precise editing of DNA, making it possible to choose specific traits and create viable GMOs more quickly. The correct answer, therefore, is "Precise traits can be chosen to produce viable organisms more quickly."
Question 7: 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?
To answer this question, we need to understand Mendelian inheritance and the impact of different gene combinations. In this case, the genotype Bb represents a heterozygous state, where B is the dominant gene for black fur and b is the recessive gene for brown fur. The phenotype, or observable trait, would be determined by the dominant gene, which in this case is black fur. Therefore, the correct answer is "fur with black hairs."
Question 8: 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?
To answer this question, we need to understand how traits are inherited and the probability of different genetic combinations. In this case, the tall plant trait is represented by the dominant allele, while the short plant trait is represented by the recessive allele. When two heterozygous plants are crossed, there is a 25% chance of producing a short plant. Therefore, the correct answer is "25%."
Question 9: Which of the following mutations would be most likely to have a harmful effect on an organism?
To answer this question, we need to understand the impact of different types of mutations on organisms. Insertions, substitutions, and deletions of bases can all have harmful effects, but the severity can vary depending on the location and nature of the mutation. In this case, a deletion of 3 bases near the center of a gene is more likely to have a harmful effect, as it can result in a frameshift mutation that alters the reading frame of the gene. Therefore, the correct answer is "a deletion of 3 bases near the center of a gene."
Question 10: Which statement best describes why Punnett squares are useful?
To answer this question, we need to understand the purpose of Punnett squares in genetic crosses. Punnett squares are used to predict the possible allele combinations and their frequencies in offspring. They can help determine the probability of certain traits being inherited and can guide breeding programs and genetic studies. Therefore, the correct answer is "Punnett squares are used to predict all possible allele combinations and their frequencies in offspring."