AP BIOLOGY

THE MOLECULAR BASIS OF INHERITANCE

DNA MAKES RNA MAKES PROTEIN

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
What are the complementary bases for this sequence of DNA:A T G C A T
A
UACGUA
B
TACGTA
C
AACCAT
D
AUTGCT
Explanation: 

Detailed explanation-1: -The complementary DNA strand of the sequence ATGC will be TACG.

Detailed explanation-2: -In DNA, the complementary bases are adenine and guanine; thymine and cytosine. Each nucleotide in DNA is composed of a nitrogen containing base, either guanine (G), adenine (A), thymine (T), or cytosine (C) as well as a monosaccharide sugar called deoxyribose and a phosphate group.

Detailed explanation-3: -Adenine makes the double bond with thymine while guanine makes the triple bond with cytosine which means adenine and thymine are complementary base pairs and cytosine and guanine are complementary base pairs. The complementary sequence for the DNA strand 5’ ATCGAACGT 3’ is 3’ TAGCTTGCA 5’.

Detailed explanation-4: -These chemical bonds act like rungs in a ladder and help hold the two strands of DNA together. There are four nucleotides, or bases, in DNA: adenine (A), cytosine (C), guanine (G), and thymine (T). These bases form specific pairs (A with T, and G with C).

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