wiz-icon
MyQuestionIcon
MyQuestionIcon
1
You visited us 1 times! Enjoying our articles? Unlock Full Access!
Question

What will be the complementary strand sequence of DNA produced during DNA replication of the following given sequence of DNA?
3' - CAGACCTGGA - 5'

A
5' - ATGCTGAACT - 3'
No worries! We‘ve got your back. Try BYJU‘S free classes today!
B
5' - GTCTGGACCT - 3'
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
C
5' - GACCTGATGC - 3'
No worries! We‘ve got your back. Try BYJU‘S free classes today!
D
5' - GCATCAGGTC - 3'
No worries! We‘ve got your back. Try BYJU‘S free classes today!
E
5' - TACGACTTGA - 3'
No worries! We‘ve got your back. Try BYJU‘S free classes today!
Open in App
Solution

The correct option is A 5' - GTCTGGACCT - 3'
As we know that two strands of DNA are antiparallel to each other and have opposite polarity. This means that 5’ phosphate of one strand faces 3’ hydroxyl group of other strand and that the 5’ phosphate groups of two strands are present in opposite position. Antiparallel arrangement of two helices allows hydrogen bonding between amino and carbonyl group of complementary base pairs (A pairs with T and G with C). Hence, the complementary strand of 3’ CAGACCTGGA 5’ will be 5’ GTCTGGACCT 3’. Therefore, the correct answer is option B.

flag
Suggest Corrections
thumbs-up
0
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
DNA Replication
BIOLOGY
Watch in App
Join BYJU'S Learning Program
CrossIcon