What is the superhelical density of a closed-circular DNA with a length of 4,200 bp and a linking number (Lk) of 374? What is the superhelical density of the same DNA when Lk = 412? Are these molecules negatively or positively supercoiled?

A. The molecule is getting negatively supercoiled.

B. The molecule is getting positively supercoiled.

C. The superhelical density is positive.

D. The superhelical density is negative.

Which of the combinations of the above statements are correct?

TLS Online TPP Program

#Question id: 11731

#Unit 6. System Physiology – Plant

Following are some statements regarding the Cytokinin, which of the following is incorrect?

TLS Online TPP Program

#Question id: 15837

#Unit 8. Inheritance Biology

You are interested in a new type of autosomal dominant mutation that gives purple eyes in Drosophila. You have a true-breeding purple-eyed line carrying a mutation that you call pr-1. You have isolated a second purple-eyed mutation that you call pr-2, which you have established in a true-breeding line that also carries a recessive marker st, which gives stubby legs. You cross a fly from the pr-1 line to a fly from the st, pr-2 line producing F1 females which you then cross to males from a true breeding st line (normal eyes). From this cross, 1000 progeny flies can be categorized into four different phenotypic classes:

                      

What is the relative order of st, pr-1 and pr-2?

TLS Online TPP Program

#Question id: 15381

#Unit 8. Inheritance Biology

Neurofibromatosis is a condition in humans which is generally inherited in a dominant fashion. Assuming this disorder is 90% penetrant, what is the chance that a single child born to a father with neurofibromatosis and a mother known not to carry the mutation will have the disorder?

TLS Online TPP Program

#Question id: 26875

#Unit 10. Ecological Principles

Facilitation may be important in

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#Question id: 5376

#General Aptitude

There are two classes A and B consisting of 40 and 52 student respectively . If the average of weight of class A is 45kg and that of class B is 40kg.Find the average of weight of all the student of class A and B.