Practice Questions

TLS Online TPP Program

#Question id: 101

You have two bottles, each of which contains a white, crystalline substance. Your lab director tells you that one contains lactose and the other sucrose. Your job is to determine which bottle contains which sugar. Which procedure would you use?

#Unit 1. Molecules and their Interaction Relevant to Biology

Test both for solubility in water. Sucrose is very soluble; lactose is only minimally soluble.
Test for the ability to reduce Ag+. Only lactose will react.
Dissolve each in water and record the pH. Lactose is far more acidic than sucrose.
React each with bromine (Br2) water. Only sucrose will react.

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TLS Online TPP Program

#Question id: 4852

#Unit 8. Inheritance Biology

The R and S loci are 20 m.u. apart. If a plant of genotype Rs/rS were allowed test cross ,which of the following progeny having 10% proportional ?

TLS Online TPP Program

#Question id: 4853

#Unit 8. Inheritance Biology

Which of the following statement is NOT true for genetic markers?

TLS Online TPP Program

#Question id: 4854

#Unit 8. Inheritance Biology

What is the full form of RFLP?

TLS Online TPP Program

#Question id: 4855

#Unit 8. Inheritance Biology

Two genes are 70cM apart, calculate the recombination frequency?

TLS Online TPP Program

#Question id: 4856

#Unit 8. Inheritance Biology

Map units on a linkage map cannot be relied upon to calculate physical distances on a chromosome for which of the following reasons?

TLS Online TPP Program

#Question id: 4857

#Unit 8. Inheritance Biology

Sturtevant provided genetic evidence for the existence of four pairs of chromosomes in Drosophila in which of these ways?