Read the passage carefully. Attempt the questions.
In our body, cell growth and differentiation is highly controlled and regulated. In cancer cells, there is breakdown of these regulatory mechanisms. Cancerous cells just continue to divide giving rise to masses of cells called tumors. Benign tumors normally remain confined to their original location. The malignant tumors, on the other hand are a mass of proliferating cells. These cells actively divide and starve the normal cells by competing for vital nutrients. Cells sloughed from such tumors reach distant sites through blood, and wherever they get lodged in the body, they start a new tumor there. This property is called metastasis. Transformation of normal cells into cancerous cells may be induced by physical, chemical or biological agents called carcinogens.
Cancer is caused by:
A. Carcinogens
B. Protein rich foods
C. Primary lymphocytes
D. Oncogenes
Choose the correct answer from the options given below:

Identify the correct sequence of events for the technique of DNA fingerprinting.
(A) Hybridization using labelled VNTR probe, followed by detection of hybridized DNA fragments by autoradiography
(B) Transfer of separated DNA fragments to synthetic membranes, such as nitrocellulose or nylon
(C) Isolation and digestion of DNA by restriction endonucleases
(D) Separation of DNA fragments by electrophoresis
Choose the correct answer from the options given below:

RNA polymerase III is responsible for the transcription of -

Recombinant DNA technology involves the following steps in a specific sequence.
(A) Culture of the host cell
(B) Extraction of desired product
(C) Isolation of desired DNA fragments
(D) Transformation of the recombinant DNA into the host cell Arrange these sequences correctly and choose the correct answer from the options given below:

Medical termination of pregnancy (MTP) is considered relatively safe -

Read the passage carefully. Attempt the questions.
An overwhelming majority (99 per cent) of animals and nearly all plants cannot maintain a constant internal environment. Their body temperature changes with the ambient temperature. In aquatic animals, the osmotic concentration of the body fluids change with that of the ambient air and water osmotic concentration. These animals and plants are simply conformers. Considering the benefits of a constant internal environment to the organism, we must ask why these conformers had not evolved to become regulators. Recall the human analogy we used above; much as they like, how many people can really afford an air conditioner? Many simply 'sweat it out' and resign themselves to suboptimal performance in hot summer months. Very small animals are rarely found in polar regions. During the course of evolution, the costs and benefits of maintainin a constant internal environment are taken into consideration. Some species have evolved the ability to regulate, but only over a limited range of environmental conditions, beyond which they simply conform.
If the stressful external conditions are localised or remain only for a short duration, the organism has five other alternatives for survival.
Conformers are the animals whose body temperature:

The first ________ was given in 1990 to a 4-year old girl with adenosine deaminase (ADA) deficiency.

Bt toxin is expressed in plants to provide resistance to insects; hence used as a bio-pesticide. Select the correct examples of Bt plants:
(A). Bt Cotton
(B). Bt Rice
(C). Bt Peas
(D). Bt Corn
Choose the correct answer from the options given below:

Which of the following is/are not considered as transition elements?
Ag, Mo, Zn, Hg, W

Which of the following techniques are used for early diagnosis of diseases?
(A). Urine analysis
(B). PCR
(C). ELISA
(D). Recombinant DNA technology (RDT)
Choose the correct answer from the options given below:

Which of the following statements are correct?
A. The matter wave picture could not incorporate the Heisenberg's uncertainity principle.
B. The wave properties of electrons have been utilised in the design of electron microscope.
C. Electron diffraction experiments have verified and confirmed the wave nature of electrons.
D. Photons are not deflected by magnetic fields.
E. The photon energy is dependent of intensity of radiation.
Choose the correct answer from the options given below:

A single stranded DNA or RNA tagged with a radioactive probe is allowed to hybridize to its complementary DNA in a clone of cells followed by detection using __________.

When radiation is incident on a metal surface of work function \( \Phi_0 \), photoelectrons are emitted with some maximum kinetic energy \( K \). If the frequency of the incident radiation is doubled, then the maximum kinetic energy of the emitted photoelectrons will become