NURSING ANM AND GNM

NURSING EXAM QUESTIONS

MICROBIOLOGY

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
The 2 strands of the DNA run ____ to each other, forming a double helix.
A
parallel
B
antiparallel
C
perpendicular
D
antiperpendicular
Explanation: 

Detailed explanation-1: -DNA is made up of two strands. Each strand has a backbone made up of alternating sugars and phosphate groups. The two strands are linked by complementary nitrogenous bases. The strands are oriented in opposite directions, making the structure “antiparallel".

Detailed explanation-2: -1: Antiparallel Strands: In a double stranded DNA molecule, the two strands run antiparallel to one another so one is upside down compared to the other. The phosphate backbone is located on the outside, and the bases are in the middle.

Detailed explanation-3: -In biochemistry, two biopolymers are antiparallel if they run parallel to each other but with opposite directionality (alignments). An example is the two complementary strands of a DNA double helix, which run in opposite directions alongside each other.

Detailed explanation-4: -Answer and Explanation: DNA is an antiparallel molecule because the two strands of DNA run opposite each other, but in a parallel manner.

There is 1 question to complete.