STANDARD Zoology Class 12 Questions

During electrophoresis, DNA fragments move towards the

Choose the wrong statement regarding AIDS

The transfer of sperms into female genital tract is called as ________.

Improved programmes covering wider reproduction related areas are currently in operation under the popular name _______ programmes

Abiogenesis means

The term 'Health' is defined in many ways. The most accurate definition of the health would be

Which of the following is true about RNAi process?

When an organ is transplanted and is rejected by the body, the lymphocytes are produced by

Which of the following is an accessory reproductive gland in male mammals?

About how long ago was the earth formed

Many freshwater animals cannot live for long in sea water and vice versa because of the ________

How many recombinant products are presently being marketed in India?

Which cells in the testes secrete testosterone, the male sex hormone?

The “family planning” were initiated in ________.

What is true for primitive atmosphere?

A typical fat molecule is made up of

Large holes in Swiss cheese are due to the bacterium

Nucleotides are building blocks of nucleic acids. Each nucleotide is a composite molecule formed by

Which of the following is not used as a bioweapon?

Statutory raising marriageable age of female to _____ and that of males ______ giving incentives to small family could tackle population explosion

The 5' end of polynucleotide chain is attached to

Statutory ban on _______ for sex-determination to legally check increasing menace of female foeticides, massive child immunisation, etc.

Which one of the following biomolecules is correctly characterized?

Cancer is generally caused due to the activation/conversion of ________ to ________ and/or inactivation of ________.

The bottled juices are clarified by the use of & ________

Which of the following are the two key concepts of Darwinian theory of evolution?

A widely used diagnostic test for AIDS is

Child death may occur in the marriage of

Pro-insulin contains

Curdling of milk takes place by

HIV virus affects in AIDS patient

The double helical model of the DNA was proposed by Watson and Crick based on what data produced by Wilkins and Franklin

Which one of the following is not a disorder of bone?

Match the type of immunity listed in column I with the examples listed in column II. Choose the answer that gives the correct combination of alphabets of the two columns

PCR is used in the detection of

The shared terminal duct of the reproductive and urinary system in the human male is

Vitamin B₁₂ is a good source of both curd and yogurt by conversion of milk to curd it increases its nutrient value by increasing the amount of B₁₂.

In the immune system, interferons are a part of

Which of the following is not a sexually transmitted disease

What happens during fertilisation in humans after many sperms reach close to the ovum

Which of the following is used as probe?

The immunoglobulin abundant in colostrum is Or Which-yellowish fluid colostrum has abundant antibody to protect the infant

A compound which is produced by an organism and inhibits the growth of other organism is called

If for some reason, the vasa efferentia in the human reproductive system get blocked, the gametes will not be transported from

_______ is one such method in which the couples avoid or abstain from coitus from day _______ of the menstrual cycle when ovulation could be expected

The factors involved in the formation of new species are:

Lymphoid tissue also located within the lining of the major tracts (respiratory, digestive and urogenital tracts) called ________.

Crystals of Bt-toxin produced by some bacteria do not kill the bacteria themselves because

In the DNA molecule

Select the correct sequence for transport of sperm cells in male reproductive system