List of practice Questions

Experiments involving use of radioactive thymidine to detect distribution of newly synthesized DNA in the chromosome was performed on which plant ?

If the refractive index from air to glass is \(\frac{3}{2}\) and that from air to water is \(\frac{4}{3}\), then the ratio of focal lengths of a glass lens in water and in air is

E. Coli fully labelled with ¹⁵N is allowed to grow in ¹⁴N medium. The two strands of DNA molecule of the first generation bacteria have

In which region of the t-RNA molecule is the amino-acid binding site located ?

In refraction, light waves are bent on passing from one medium to second medium because, in the second medium.

Match the scientists of Column I with their contributions in Column II :

Column I		Column II
i.	Griffith	p.	Lac operon
ii.	Jacob & Monad	q.	DNA is the genetic material
iii.	Meselson & Stahl	r.	Transforming principle
iv.	Hershey and Chase	s.	DNA replicates semi-conservatively

The source of electromagnetic wave can be a charge.

Which among the following characters selected by the Mendel in a pea plant is a recessive character ?

Suppose that the electric field amplitude of electromagnetic wave is \(E_o=120\ NC^{-1}\) and its frequency if f = 50 MHz. Then which of the following value is incorrectly computed ?

Match the Column I with Column II :

Column I		Column II
i.	Autosomal trisomy	p.	Turner's Syndrome
ii.	Allosomal trisomy	q.	Mendelian disorder
iii.	Allosomal Monosomy	r.	Klinefelter's Syndrome
iv.	Cystic fibrosis	s.	Down's Syndrome

What is the possible blood group of children whose parents are heterozygous for A & B blood groups ?

What will be the reading in the voltmeter and ammeter of the circuit shown ?

The genotype of a husband and wife are I^AI^B & I^AI^O. Among the blood types of their children, how many different genotypes & phenotypes are possible?

LC osillations are similar and analogous to the mechanical oscillations of a block attached to a spring. The electrical equivalent of the force constant of the spring is

In an oscillating LC circuit, L = 3.00 mH and C=2.70µF. At t = 0 the charge on the capacitor is zero and the current is 2.00A. The maximum charge that will appear on the capacitor will be :

Match Column I with Column II and find the correct answer :

Column I		Column II
1.	Aneuploidy	p.	Increase in whole set of chromosomes
2.	Monoploidy	q.	Loss or gain of a chromosome
3.	Polyploidy	r.	Two sets of chromosomes
4.	Diploidy	s.	A single set of chromosomes

The method of directly injecting a sperm into ovum is called

The physical quantity which is measure in the unit of wb A^-1 is

Select the incorrect statement about contraceptives.

Under the influence of oxytocin which layer of the uterus exhibits strong contractions during parturition ?

The current following through an inductance coil of self inductance 6 mH at different time instants is as shown. The emf induced between t = 20s and t = 40s is nearly

Select the correct path of flow of milk during breast feeding.

Which cell of the female gameophyte is involved in the formation of primary endosperm nucleus (PEN) after fertilization ?

Which of the following aquatic plant does not show pollination by water ?