Question

Which best describes STRs?
a.a piece of non-coding DNA that consists of 9–80 repeating sequences of base pairs
b.a piece of coding DNA that consists of 9–80 repeating sequences of base pairs
c.a piece of coding DNA consisting of 2–5 repeating sequences of base pairs
d.a piece of non-coding DNA consisting of 2–5 repeating sequences of base pairs

Answer 1

Answer:

Option- B

• STRs( Short tandem repeat polymorphism) is best described by a piece of coding DNA that consists of 9–80 repeating sequences of base pairs.

Answer 2

Answer:

The correct answer is: D. a piece of non-coding DNA consisting of 2–5 repeating sequences of base pairs.

Explanation:

STRs, abbreviated from Short Tandem Repeat, are microsatellites: sequences of non-coding DNA that repeat units that are 2 to 5 base pairs in length. The number of repetitions of these sequences varies from people to people, which gives it a significant importance in the fields of forensics, where is used to identify a person.

Non-coding DNA is a sequence that will not translate into any protein. Half of our DNA is made of non-coding DNA.