Question 1(Multiple Choice Worth 4 points)

Question

(03.02 MC)

A DNA sequence reads: TACGATCATATT. Which of the following is the correct complementary DNA strand?

ATGCTAGTATAA
AUGCUAGUAUAA
CGTAGCTGCGCA
GCAUCGAGUAUA
Question 2(Multiple Choice Worth 4 points)
(03.02 MC)

One strand of a DNA molecule has the base sequence ATAGGT. The complementary base sequence on the other strand of DNA will be ________.

CGCUUC
CGCTTC
UAUCCA
TATCCA
Question 3(Multiple Choice Worth 4 points)
(03.02 MC)

Which of the following is true about DNA replication?

Enzymes break the hydrogen bonds between the nitrogenous bases to separate the two strands of DNA.
DNA replication allows for the formation of hydrogen bonds to copy two old strands of DNA.
DNA polymerase is an enzyme that works to transport DNA from the nucleus to the cytoplasm.
The double helix results from two old strands of DNA fused together to form two new strands.
Question 4(Multiple Choice Worth 4 points)
(03.02 LC)

Which of the following is a complementary base pair for DNA?

Adenine and cytosine
Guanine and cytosine
Adenine and guanine
Cytosine and thymine
Question 5(Multiple Choice Worth 4 points)
(03.02 MC)

During the replication of DNA

both strands of the DNA molecule act as templates
only one strand of DNA acts as a template
the cell also undergoes mitosis
the reaction is catalyzed by RNA polymerase

Answer 1

Here are the answers to your questions based on the principles of molecular biology:

Question 1: A DNA sequence reads: TACGATCATATT. The complementary DNA strand is formed by pairing adenine with thymine and cytosine with guanine.

• T (Thymine) pairs with A (Adenine)
• A (Adenine) pairs with T (Thymine)
• C (Cytosine) pairs with G (Guanine)
• G (Guanine) pairs with C (Cytosine)
• A (Adenine) pairs with T (Thymine)
• T (Thymine) pairs with A (Adenine)
• C (Cytosine) pairs with G (Guanine)
• A (Adenine) pairs with T (Thymine)
• T (Thymine) pairs with A (Adenine)
• A (Adenine) pairs with T (Thymine)
• T (Thymine) pairs with A (Adenine)

The correct complementary strand is: ATGCTAGTATAA.

Question 2: For the DNA sequence ATAGGT, the complementary base pairing will be:

• A (Adenine) pairs with T (Thymine)
• T (Thymine) pairs with A (Adenine)
• A (Adenine) pairs with T (Thymine)
• G (Guanine) pairs with C (Cytosine)
• G (Guanine) pairs with C (Cytosine)
• T (Thymine) pairs with A (Adenine)

The complementary sequence is: TATCCA.

Question 3: The correct statement about DNA replication is:

• Enzymes break the hydrogen bonds between the nitrogenous bases to separate the two strands of DNA.

Question 4: The complementary base pairs in DNA are:

• Guanine and cytosine.

Question 5: During the replication of DNA:

• Both strands of the DNA molecule act as templates.

Please let me know if you need any further explanations or clarifications!