61.

Which of the following is not a sexually transmitted disease?

• Syphills

• Acquired Immuno Deficiency Syndrome (AIDS)

• Trichomoniasis

• Trichomoniasis

An abnormal human baby with 'XXX' sex chromosomes was born due to

• formation of abnormal sperms in the father

• formation of abnormal ova in the mother

• fusion of two ova and one sperm

• fusion of two ova and one sperm

Alleles are 

• different phenotype

• true breeding homozygotes

• different molecular forms of a gene

• different molecular forms of a gene

Gene regulation governing lactose operon of E.coli that involves the lac I gene product is

• Positive and inducible because it can be induced by lactose

• Negative and inducible because repressor protein prevents transcription

• Negative and repressible because repressor protein prevents transcription.

• Negative and repressible because repressor protein prevents transcription.

In sea Urchin DNA, which is double stranded, 17% of the bases were shown to be cytosine. The percentages of the other three bases expected to be present in this DNA are:

• G 34%, A 24.5%, T 24.5%

• G 17%, A 16.5%, T 32.5%

• G 17%, A 33%, T 33%

• G 17%, A 33%, T 33%

Which of the following had the smallest brain capacity?

• Homo erectus

• Homo sapiens

• Homo neanderthalensis

• Homo neanderthalensis

A population will not exist in Handy - Weinberg equilibrium if

• individuals mate selectively

• there are no mutations

• there is no migration

• there is no migration

Match each disease with its correct type of vaccine:

• Code
           A   B  C    D
           2   1   3    4
• Code
           A   B    C    D
           3    2    4    1
• Code
           A   B    C    D
           4    3     2    1
• Code
           A   B    C    D
           4    3     2    1

HIV that causes AIDS, first starts destroying 

• B- Lymphocytes

• Leucocytes

• Helper T- Lymphocytes

• Helper T- Lymphocytes

The active form of Entamoeba histolytica feeds upon

• erythrocytes; mucosa and submucosa of colon

• mucosa and submucosa of colon only

• food in intestine

• food in intestine