AIIMS Zoology Questions

During vigorous exercise sufficient oxygen is not available to meet the required energy, so energy is derived through conversion of pyruvic acid to lactic acid.

Chimeric DNA is

Virus free plants can be generated through-

What are the requirements in tissue culture

If mitochondria is absent in mature RBC what will be the source of energy:

In Ti⁻plasmid, which of the following is removed:

Assertion: Somaclonal variations produce slight differences in plant Reason: In bacteria, transcription and translation occurs in cytoplasm

In cockroach

Match the following columns and select the correct option.

Free swimming, radially symmetrical animals with cnidocytes belong to

Which is not true for cockroach?

Which of the following integrates Nervous and endocrine system

Choose the correct option

Choose the correct difference from the following

Characteristics of female cockroach

Identify the given diagram of tissue performing secretion and absorption

Cervical vertebrae differ from other vertebra in having -

Protein on reaction with which yields Ruhemann's purple?

Acquired Immunity mediated by which of the following

Blood circulation in earthworm is :

Which cell is found in mucus secreting organs.

Which maintains static equilibrium -

Choose the correct statement

Choose the correct one

Blood group of the father is A and blood group of mother is B. Then predict the blood group of the progeny -

Skeletal muscles are controlled by -

Which of the following options have features corresponding to the given animals

Choose the correct option for the labelling in the given diagram (A, B, C, D)

Myosin head separates from actin when:

Which statement is incorrect for earthworm

Position of testis in Periplaneta americana

A group of individuals resembling each other in morphological, physiological, biochemical and behavioral characters constitute a species. Such individuals can breed among themselves but cannot breed with members other than their own to produce fertile offspring. New species are formed mainly due to reproductive isolation.

The assertion statement is true that ‘small particulate matter of size 2.5μm or less is harmful for health. The reason statement is also true that ‘nasal cavity and throat filters most of the large particles’, but it is not the correct explanation for assertion.

Activity of phagocytosis occurs through

The assertion statement is true that ‘Baculovirus can be used to control the population of nucleopolyhedrovirus, but the reason saying that ‘they are effective against plant pathogens’ is not the correct explanation for assertion.

The statement given in both assertion and reason are wrong. Selaginella and Salvinia do not produce spores that cannot be differentiated by sex.

The process of gene cloning becomes possible with the help of recombinant DNA technology. It is a process in which isolation and insertion of gene of interest is carried out in different organisms.

The statement given in the assertion is known to be true as deficiency of iron causes abnormality in the menstrual cycle. The statement given in the reason is known to be false because the levels of estrogen and progesterone do not become low.

Assertion: Coacervates are believed to be the precursors of life. Reason: Coacervates are self-duplicating aggregates of protein surrounded by lipid molecules.

A single female genital pore is present on the 14^{th} segment through which female reproductive bodies (ova) are discharged during copulation. The segments 14-16 of a matured

Enzymes are of various types depending on their action. Hydrolases catalyses the hydrolysis of ester, ether, peptide, glycosidic, C⁻C, C⁻halide, P⁻N bonds etc. They are formed by dehydration and condensation. Hydrolases break up large molecules into smaller ones with the help of hydrogen and hydroxyl groups of water molecules. This phenomenon is called

Assertion: Malpighian tubules are excretory organs in most of the insects

The scurvy is not caused by the deficiency of an element, as it is caused by the deficiency of vitamin C. Also, the statement given in the reason that, ‘daily requirement of ascorbic acid is 5 mg/day is incorrect. It is 90 mg in adult males and 75 mg in adult females.

Blood pressure is the arterial pressure of blood exerted on the wall of arteries with each heart beat. It is measured from the brachial artery in the elbow pit. It is expressed as, systolic pressure (mm/Hg) / diastolic pressure (mm/Hg). Arterial (Superficial; arteries) blood pressure is measured by sphygmomanometer.

Assertion: DNA fingerprinting is applied in paternity testing in case of disputes. Reason: It employs the principle of polymorphism in DNA sequences as the polymorphisms are inheritable from parent to children.

The process of delivery of foetus (childbirth) is called parturition. Parturition is induced by a complex neuroendocrine mechanism. The signals for parturition originate from the fully developed foetus and the placenta which induces mild uterine contractions called foetal ejection reflex. This triggers release of oxytocin from the maternal pituitary. Oxytocin acts on the uterine muscles and causes stronger uterine contractions which in turn stimulate further secretion of oxytocin.

Essential amino acids are those which are taken from food and not synthesized in the body whereas non-essential amino acids need not be supplied in the diet and are synthesized in the body. Glycine, serine and tyrosine are non-essential amino acids.

In IVF method, popularly known as test tube baby programme, ova from the wife/donor (female) and sperms from the husband/donor (male) are collected and introduced to form zygote under simulated conditions in the laboratory. The zygote or early embryos (with upto 8 blastomeres) could be transferred into the fallopian tube (ZIFT) and embryos with more than 8 blastomeres into the uterus (IUT). This is in vitro fertilization (IVF⁻fertilisation outside the body in the almost similar condition as that in the body) followed by embryo transfer (ET).

Assertion: Acraniata is a group of organisms which do not have distinct cranium. Reason: It includes small marine forms without head.

Na and K concentration changes across the muscle cell membrane resulting in development of potential difference. So, Na and K ions are necessary for muscle contraction. Thus, both assertion and reason are true.