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.
Identify the measure which is not useful for prevention and control of alcohol abuse among adolescents.

The condition where one species is harmed whereas the other is unaffected is called.

Which one of the following regions is called as "lungs of the planet"?

Read the passage and answer the following
Microbes are organisms that cannot be seen with the naked eye. They include bacteria, archaea, protists, viruses, prions, and fungi. They account for most of the diversity of life on earth. Far more microbes inhabit a single person's body than there are people on the entire planet. Microbes also dominate in terms of their ability to live and thrive in extreme environments, including clouds, deep-sea volcanoes, springs, ice caps, and animal intestines. Most animals, including humans, exhibit numerous associations with microbes. Our "human microbiome" includes our skin, hair, mouth, and gut.
Match List - I with List - II.

List - I	List - II
(A) Methanobacterium	(I) Swiss cheese
(B) Lactobacillus	(II) Ethanol
(C) Propionibacterium sharmanii	(III) Biogas
(D) Saccharomyces cerevisiae	(IV) Curd

Choose the correct answer from the options given below:

Select the steps of PCR technique from the following: DU Buddy
A. Primer synthesis
B. Primer annealing
C. DNA denaturation
D. Primer extension
E. DNA cleavage
Choose the correct answer from the options given below:

Which of the following is correct in the context of haemophilia ?

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 have not evolved to become regulators because:

The function \(f: Z \rightarrow Z\) defined by \(f(x)=x^2+x\), where \(Z\) is the set of integers, is:

When 1 mol of CrCl\(_3\) \(\cdot\) 6H\(_2\)\(O\) is treated with excess AgNO\(_3\), 3 mol of AgCl are obtained.
The conductivity of the solution will correspond to:

Let \(P\) be the point of intersection of the line \(\frac{x+5}{6}=\frac{y+4}{1}=\frac{3-z}{1}\) and the plane \(x+y+2 z=2\).
If \(Q\) is the point \((-3,3,4)\), then \((P Q)^2\) is equal to

If \(A=\left[\begin{array}{cc}2-x & 1 \\ 3 & y+2\end{array}\right]\) and \(B=\left[\begin{array}{cc}y & 1 \\ 3 & 2 x+1\end{array}\right]\) are such that A = B, then values of z and y are respectively :

When an intrinsic semi conductor is doped with an acceptor impurity :
(A) The hole concentration increases
(B) The conductivity of semiconductor decreases
(C) The electron concentration increases
(D) The energy gap decreases
Choose the correct answer from the options given below :

Read the passage carefully and answer the Questions
A homogeneous mixture of two or more than two components has uniform composition and properties. The binary solutions have two components, which may be solid, liquid or gas. The resultant solution has a larger amount of solvent and a smaller amount of solute. The amount of solute in a given amount of solvent decides the concentration of the resulting solution. The concentration can be expressed in various ways, like molarity, molality, normality and mole fraction.
Glucose dissolved in water and ethanol dissolved in water are examples of: