List of top Biology Questions

In a cross between a male and female, both heterozygous for sickle cell anaemia gene, what percentage of the progeny will be diseased ?

Which stage of meiotic prophase shows terminalisation of chiasmata as its distinctive feature

Match List - I with List - II.

 Choose the correct answer from the options given below.

 

Match List - I with List - II.

Choose the correct answer from the options given below.

Which of the following characteristics is incorrect with respect to cockroach ?

Which one of the following is an example of Hormone releasing IUD ?

The centriole undergoes duplication during

Receptors for sperm binding in mammals are present on

The organelles that are included in the endomembrane system are

Which one of the following belongs to the family Muscidae

Plasmid $pBR322$ has PstI restriction enzyme site within gene $a m p^{R}$ that confers ampicillin resistance. If this enzyme is used for inserting a gene for $\beta$-galactoside production and the recombinant plasmid is inserted in an E.coli strain

Veneral diseases can spread through : (a) Using sterile needles (b) Transfusion of blood from infected person (c) Infected mother to fetus (d) Kissing (e) Inheritance Choose the correct answer from the options given below

Statement I : The codon ‘AUG’ codes for methionine and phenylalanine. 
Statement II : ‘AAA’ and ‘AAG’ both codons code for the amino acid lysine. In the light of the above statements, 
choose the correct answer from the options given below

A bacterial flagellum is composed of

For effective treatment of the disease, early diagnosis and understanding its pathophysiology is very important. Which of the following molecular diagnostic techniques is very useful for early detection

Read the following statements. 
(a) Metagenesis is observed in Helminths. 
(b) Echinoderms are triploblastic and coelomate animals. 
(c) Round worms have organ-system level of body organization. 
(d) Comb plates present in ctenophores help in digestion. 
(e) Water vascular system is characteristic of Echinoderms. 
Choose the correct answer from the options given below.

Which one of the following organisms bears hollow and pneumatic long bones

With regard to insulin choose correct options. 
(a) C-peptide is not present in mature insulin. 
(b) The insulin produced by rDNA technology has C-peptide. 
(c) The pro-insulin has C-peptide. 
(d) A-peptide and B-peptide of insulin are interconnected by disulphide bridges.
Choose the correct answer from the options given below.

Succus entericus is referred to as

Sphincter of odd is present at

Following are the statements with reference to ‘lipids’. 
(a) Lipids having only single bonds are called unsaturated fatty acids.
(b) Lecithin is a phospholipid. 
(c) Trihydroxy propane is glycerol.
(d) Palmitic acid has 20 carbon atoms including carboxyl carbon. 
(e) Arachidonic acid has 16 carbon atoms. 
Choose the correct answer from the options given below.

During the process of gene amplification using PCR, if very high temperature is not maintained in the beginning, then which of the following steps of PCR will be affected first ?

Chronic auto immune disorder affecting neuro muscular junction leading to fatigue, weakening and paralysis of skeletal muscle is called as :

Match List - I with List - II

List - I List - II Choose the correct answer from the options given below.