Revision

REVISION

BIOLOGY

Multiple Choice

The pedigree below tracks Duchenne Muscular Dystrophy (DMD) through several generations. DMD is an X-linked recessive trait.

Pedigree of family with Duchenne Muscular Dystrophy

If individual II-3 has a child with a carrier woman, what is the percent chance that the child will be a daughter with DMD?

• 0%

• 25%

• 50%

Multiple Choice

artificial introduction of sperm from donor in to female reproductive tract is known as

• IVF

• ICSI

• ZIFT

• artifical insemination

Multiple Choice

identify the developmental stage of embryo

• zygote-blastula-morula-gastrula

• zygote-morula-blastula-gastrula

Multiple Choice

identify the given stage of embryonic development in human

• morula

• blastula

• gastrula

Multiple Choice

immunosuppresent is

• streptokinase

• cyclosporin A

• statin

Multiple Choice

example of cytokinine barrier

• interlukines

• tear

• sweat

• interferons

Open Ended

define parthenogenesis

Multiple Choice

the hormone secreted by corpus luteum

• estrogen

• progesterone

• relaxin

Multiple Choice

the hormones which help in the development of primary follicle to graffian follicle is

• progesterone

• hCG

• estrogen

• Oxytocin

Multiple Choice

the chomosome number present in female honey bee is

• 16

• 32

• 24

Open Ended

what is autoimmune disease?

Multiple Choice

In a maternity clinic, for some reasons the authorities are not able to hand over the two newborns to their respective real parents. Name and describe the technique that you would suggest to sort out the matter.

• Polymerase chain reaction

• DNA fingerprinting

Open Ended

Which human chromosome has maximum number of genes and which one has fewest genes?

Multiple Choice

Given below is a schematic representation of a lac operon in the absence of an inducer. Identify ‘A’ in it

• repressor

• inducer

Multiple Choice

Which one of the following acts as a physiological barrier

to the entry of microorganisms in human body?

• (1) Monocytes

• (2) Epithelium of urogenital tract (

• 3) Skin

• (4) Tears

Multiple Choice

Where will you look for the sporozoites of the malarial

parasite?

• (1) Spleen of infected humans

• (2) Saliva of infected female Anopheles mosquito

• (3) Salivary glands of freshly moulted female Anopheles mosquito

• 4) Red blood corpuscles ofhumans suffering from malaria

Multiple Choice

The length of DNA molecule greatly exceeds the

dimensions of the nucleus in eukaryotic cells. How is this DNA

accommodated?

• (1) through elimination of repititive DNA

• 2) super-coiling in nucleosomes

• (3) deletion of non-essential genes.

• (4) DNase digestion

Multiple Choice

What part of central dogma is not always followed in viruses?

• The flow of information in HIV is from RNA to DNA, then back to RNA to proteins. Influenza viruses never go through DNA.

• The flow of information is from protein to RNA in HIV virus, while the influenza virus converts DNA to RNA.

• The flow of information is similar, but nucleic acids are synthesized as a result of translation in HIV and influenza viruses.

• The flow of information is from RNA to protein. This protein is used to synthesize the DNA of the viruses in HIV and influenza.