List of top Biology Questions

Silencing of a gene could be achieved through the use of

Which of the following diagnostic tools allows the detection of very low concentration of bacterium or viruses by amplifying their nucleic acid ?

Rapid antigen test and RT-PCR are the two diagnosis test for Covid-19 virus. PCR, a molecular diagnostic, tool stands for

Rop-gene which codes for the proteins involved in the replication of the plasmid pBR322 in E.coli is located at restriction site of

Taq polymerase that finds its application in PCR is obtained from

Match the following :

Column I		Column II
i.	Cyclosporin - A	a.	Clot busters
ii.	Streptokinase	b.	Antibiotic
iii.	Statins	c.	Immuno supressive agent
iv.	Penicillin	d.	Blood cholesterol lowering agent

Which among the following products of microbes is not obtained from fungi ?

The technology of biogas production was developed in India due to the efforts of

Which among the following plants is a source of drug which is native to America ?

Identify the techniques useful in detecting the cancers of internal organs.

Which is the most feared property of malignant tumors ?

The development of quick immune response in a person infected with deadly microbes by administering preformed antibodies is

Pneumonia is caused by

If the sequence of nucleotides in a template stand of DNA is 3-'ATGCTTCCGAAT-5'. Write the sequence in the corresponding region of the transcribed m-RNA.

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

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 ?

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

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

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 ?

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?

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

Select the incorrect statement about contraceptives.