AP BIOLOGY

THE MOLECULAR BASIS OF INHERITANCE

DNA REPLICATION

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Which sequence of DNA bases would pair with this partial strand? CAT TCA CTG
A
GUA AGU GAC
B
TAC ACT GTC
C
GTA AGT GAC
D
CAT TCA CTG
Explanation: 

Detailed explanation-1: -DNA base pair. Under normal circumstances, the nitrogen-containing bases adenine (A) and thymine (T) pair together, and cytosine (C) and guanine (G) pair together.

Detailed explanation-2: -Solution : (c) Adenine always pairs with thymine and cytosine always pairs with guanine. Thus, sequence of bases on complementary strand would be TACGTACGT.

Detailed explanation-3: -If half of the DNA molecule is given as ACG-TCC-GTA then the complementary strand to that will be b. TGC-AGG-CAT. The base pairing of DNA is formed based on the complementarity base pairing. Therefore Adenine pairs with Thymine and Cytosine pairs with Guanine.

Detailed explanation-4: -If the base sequence of one strand of DNA is CAT, TAG, CAT, CAT, GAC, the base sequence of its complementary mRNA would be GUA, AUC, GUA, GUA, CUG.

There is 1 question to complete.