Question

if i have 8 dna nucleotides, how many dna nitrogenous bases do i have?
16
2
8
4
8
multiple choice 10 points
what would be the complementary dna strand for the following strand of dna: att gac
uaacug
taactg
attgac
cagtta
9
multiple choice 10 points
what would be the complementary rna strand for the following strand of dna: att gac
uaacug

Explanation:

For question 8:

• DNA nucleotides are composed of a nitrogenous base, a deoxyribose sugar, and a phosphate group. So each DNA nucleotide has 1 nitrogenous base. If there are 8 DNA nucleotides, then the number of nitrogenous bases is 8.

For question 9:

• In DNA, adenine (A) pairs with thymine (T), and cytosine (C) pairs with guanine (G). The given DNA strand is ATTGAC.
• For the complementary DNA strand:
• A (adenine) pairs with T (thymine), T (thymine) pairs with A (adenine), T (thymine) pairs with A (adenine), G (guanine) pairs with C (cytosine), A (adenine) pairs with T (thymine), C (cytosine) pairs with G (guanine). So the complementary DNA strand is TAACTG.

For question 10:

• When forming RNA from DNA, adenine (A) in DNA pairs with uracil (U) in RNA, thymine (T) in DNA pairs with adenine (A) in RNA, cytosine (C) in DNA pairs with guanine (G) in RNA, and guanine (G) in DNA pairs with cytosine (C) in RNA.
• Given the DNA strand ATTGAC:
• A (adenine) in DNA → U (uracil) in RNA, T (thymine) in DNA → A (adenine) in RNA, T (thymine) in DNA → A (adenine) in RNA, G (guanine) in DNA → C (cytosine) in RNA, A (adenine) in DNA → U (uracil) in RNA, C (cytosine) in DNA → G (guanine) in RNA. So the complementary RNA strand is UAACUG.

Answer:

Question 8: 8
Question 9: TAACTG
Question 10: UAACUG