NEET Zoology Class 12 Questions

Among the following, the essential amino acid is

Most common types of secondary structures of proteins are

Amino acids generally exist in the form of Zwitter ions. This means they contain

Select the incorrect match.

Select the correct match w.r.t. different methods of contraception.

Which of the following are included in barrier method?

Consider the following statements. Statement (A): The malignant malaria is caused by Plasmodium falciparum. Statement (B): The malarial parasite reproduces sexually in the liver cells, bursting the cells and releasing sporozoites into the blood. In the light of above statements, select the correct option.

Select the incorrect match from the following.

All of the following statements are correct w.r.t. periodic abstinence, except

Select the incorrect pair w.r.t. Lac operon.

Incorrect statement w.r.t human reproduction is (1) Capacitation occurs in female reproductive tract. (2) Fertilization is feasible if both sperm and ovum are transported simultaneously to the ampullary region of fallopian tube. (3) Circulating levels of estrogen and progesterone in females regulates the changes in GnRH pulse frequency. (4) In females, meiosis-I completes at the time of birth.

Select the condition which helps in increasing the rate of decomposition of detritus.

Select the correct statement w.r.t. immunity in higher vertebrates.

Which of the following gland is often referred in connection with AIDS?

The extinction of ecologically unique assemblage of cichlid fish in the Victoria Lake is due to

The technique called gamete intra fallopian transfer (GIFT) is recommended for those females

In 1951, India initiated 'Family Planning Programmes' at a national level to attain

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

Match the following and choose the correct options:

Complete the following analogy: Filariasis: Culex: Dengue?

Which one of the following is the incorrect statement for IUDs

In the given below example how many diseases are viral - Dengue, chikungunya, AIDS, influenza, Chicken pox, typhoid, cholera.

In spermatogenesis, reduction division of chromosomes occurs during conversion of

Assertion: The presence or absence of hymen is not a reliable indicator of virginity or sexual experience. Reason: It can also be broken by a sudden fall or jolt, insertion of a vaginal tampon, active participation in some sports like horseback riding, cycling, etc., or in some women the hymen persists even after coitus.

Who is known as the Darwin of 20^{th} Century?

Artificial insemination means:

What is the function of copper-T?

At the time of fertilization

The first movement of foetus and hairs on the head appears after

Given below are two statements: Statement I: The immediate adverse effects of drugs and alcohol abuse are manifested in the form of reckless behaviour, vandalism and violence. Statement II: Withdrawal syndrome is characterised by anxiety, shakiness, nausea and sweating may be relieved when use is resumed again. In the light of the above statements, choose the most appropriate answer from the options given below:

Cyclosporin-A is used as

Match the disease given in list-I with list-II and list-III and choose correct option:

In his simulating experiment, S.L. Miller created similar conditions by using electrical discharge in a closed flask containing

Match column I with column II

Reason: Presence of glucose (Glycosuria) and ketone bodies (Ketonuria) in urine are indicative of diabetes mellitus. Assertion: Both A and R are true and R is the correct explanation of A.

Tasmanian wolf and placental wolf appear similar due to

Select the odd one w.r.t. homologous organs.

Given below are assertion and reason mark the correct choice from given options: Assertion: ADA deficiency patient can be cured by bone marrow transplantation and injection of functional ADA enzyme. Reason: Both of these approaches are not completely curative.

How many below given statements are incorrect? (i) Intra Uterine Devices (IUDs) are inserted by doctors or expert nurses in the fallopian tube. (ii) Lippe's loop is a copper releasing IUDs. (iii) Cu₇ and multiload 375 releases progesterone. (iv) Progestasert prevents ovulation. (v) Oral administration of small doses of either progestogen or progestogen-estrogen combinations is used as a contraceptive method. (vi) Mala-D is steroidal pills have to be taken daily for a period of 21 days starting preferably within the first five days of menstrual cycle. (vii) Progestogens alone or in combination with estrogen can also be used by females as injections or implants under the skin.

Fill up the blanks given in statements and choose most suitable words. (i) __________ (1) __________ cells show a property of __________ (2) __________ due to which they inhibit uncontrolled growth of adjacent cells. (ii) Metastasis is the most feared property of __________ (3) __________ tumours. (iii) The malignant tumours are a mass of proliferating cells called __________ (4) __________ cells. (iv) Cancer causing viruses called __________ (5) __________ have genes called __________ (6) __________. (v) __________ (7) __________ against cancer specific __________ (8) __________ are also used for detection of certain cancers.

Which statements are correct for drugs? (i) Heroin is a white, odourless, bitter crystalline compound which generally taken by snorting and injection. (ii) Cannabinoids generally taken by inhalation and oral ingestion. (iii) Cocaine, commonly called coke or crack is usually snorted. (iv) Coca alkaloid or cocaine is obtained from coca plant Erythroxylum coca, native to South America. (v) These days cannabinoids are also being abused by some sportspersons. (vi) Excessive dosage of cocaine causes hallucinations. (vii) Lysergic acid diethyl amides (LSD), Atropa belladona and Datura produces hallucinogenic effect.

How many pair of statements are incorrect? (A) RCH⁻STD prevention (B) Saheli - Once a week (C) Saheli - centchroman (D) Increase in population - Increase MTP (E) Population growth rate Expressed in per thousand individuals (F) Marriageable age for male in India^{-21} yrs

Identify the organisms that are found in hot springs.

Match the following columns:

LH surge;

The first movement of foetus can be observed during which month of pregnancy?

Identify the procedure shown in the figure given below:

The disease Chickunguniya is transmitted by:

Assertion (A): The principle of vaccination is based on memory property of our immune system. Reason (R): Vaccines generates memory-B and T cells that recognise the pathogen quickly on subsequent exposure.

Which of the following is a method of birth control?