Read the following passage carefully and answer the given questions
The separated DNA fragments can be visualized only after staining the DNA with ethidium bromide followed by exposure to UV radiation. Bright orange colored bands of DNA in ethidium bromide stained gel exposed to UV light can be seen. The separated bands of DNA are cut out from the agarose gel and extracted from the gel piece. This step is known as elution. The DNA fragments purified in this way are used in constructing recombinant DNA by joining them with a cloning vector.
The DNA band appears orange due to -

Amniocentesis should not be used for:

Sickle-cell anaemia is:

Find out the odd one out among the following structures in relation to evolution?

Alcohol is a depressant, which means that even small amounts of alcohol slow down the actions of parts of the brain, so alcohol lengthens the time you take to respond to a stimulus.
Different people react differently to alcohol. In some people, it increase their feelings of aggression, and releases their inhibitions so that they are more likely to be violent or commit other crimes.
An alcoholic needs to drink quite large quantities of alcohol regularly. This causes many parts of the body to be damaged, because alcohol is poisonous to cells. Probably, there are many factors which decide whether or not a person becomes alcoholic. Over a long period of time, it can cause loss of memory and confusion. One way in which the damage is done is that alcohol in the body fluids draws water out of cells by osmosis.
Withdrawal symptoms of alcohol are __________

Which one of the followings does not favour decomposition?

Identify the correct sequence of events during menstrual cycle?
(A) Next cycle begins
(B) Proliferative phase
(C) Menstruation
(D) Secretory phase
Choose the correct answer from the options given below:

Amines are reactive in nature, mainly due to difference in electronegativity between Nitrogen and Hydrogen and, due to lone pair of electrons on Nitrogen. Amines behave like nucleophiles and as good lewis bases and there are various reactions to support this. Different degree of amines differ in their reactivity due to steric hinderance and electronic effects. Aromatic amines are less basic due to + R effect, hence have higher pk value than aliphatic amines. Basic strength of amines also depends on stability of corresponding conjugate acid in aqueous medium.
Conjugate acid of which of the following amines is most stable?

Select the incorrect statements with respect to the origin and evolution of man.
A. Ramapithecus was more man like primates
B. Dryopithecus was more ape- like primates
C. Australopithecines probably lived in East Asian grasslands
D. The first human like being the hominid was called Homo habilis
Choose the correct answer from the options given below:

If \(x y=e^{(x-y)}\), then \(\frac{d y}{d x}\) is equal to:

Which of the following reagents are used for denaturation of alcohol?

Given below are some stages of human evolution. Arrange them in correct sequence (Past to Recent)
(A) Homo habilis
(B) Homo sapiens
(C) Homo neanderthalensis
(D) Homo erectus
Choose the correct answer from the options given below:

If \(|\vec{a}|=1,|\vec{b}|=2,|2 \vec{a}+\vec{b}|=2 \sqrt{3}\) then \(|\vec{a}-\vec{b}|\) is :