Alexander Fleming discovered Penicillin, an antibiotic while working on which bacteria ?

Arrange the following steps involved in transformation of bacteria in a sequence from initiation to end.
(A) Incubation of rDNA with bacterial cell on ice
(B) Treatment with divalent cations
(C) Heat shock treatment
(D) Selection on antibiotic containing agar plate
(E) Placed them again on ice
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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.
Normal cells show a property that does not allow their uncontrolled growth. This property is known as:

Match List I with List II.

LIST I	LIST II
A. Epidermophyton sp.	I. Typhoid
B. Haemophilus influenzae	II. Elephantiasis
C. Wuchereria malayi	III. Ringworm
D. Salmonella sp.	IV. Pneumonia

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Thorn of Bougainvillea and tendril of Cucurbita are:

Identify the symptoms of Amoebiasis from the following.
(A) Constipation
(B) Diarrhoea and vomitting
(C) Abdominal pain and cramps
(D) Excess mucous and blood clots in stool
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Which one of the following options will express intermediate skin colour in an individual?

Which of the following features are required to facilitate cloning?
(A) Presence of origin of replication (Ori) in the cloning vector
(B) Presence of a selectable marker in the cloning vector
(C) Presence of a single recognition site (preferably) for restriction enzyme in the cloning vector
(D) Presence of more than two promoter regions in the cloning vector
Choose the correct answer from the options given below:

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.
Continuous intake of alcohol causes _________

If a matrix \(A=\left[\begin{array}{cc}5 & -8 \\ -3 & 5\end{array}\right]\) then which of the following is / are TRUE?
(A) |A| = 1
(B) A is a singular matrix.
(C) \(-2 A=\left[\begin{array}{cc}10 & -16 \\ -6 & 10\end{array}\right]\)
(D) \(A I=\left[\begin{array}{ll}5 & 0 \\ 0 & 5\end{array}\right] I\) is an identity matrix of order 2.
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Read the passage and answer the question given below.
When a host is exposed to antigens, which may be in the form of living or dead microbes or other proteins, antibodies are produced in the host body. This type of immunity is called active immunity. Active immunity is slow and takes time to give its full effective response. Injecting the microbes deliberately during immunisation or infectious organisms gaining access into body during natural infection induce active immunity. When antibodies are directly given to protect the body against foreign agents, it is called passive immunity.
Match List I with List II

LIST I	LIST II
A. Physical Barrier	I. Saliva
B. Cellular Barrier	II. Interferons
C. Physiological Barrier	III. Skin
D. Cytokine Barrier	IV. Polymorpho-nuclear leukocytes

Choose the correct answer from the options given below:

In LCR series circuit with resistance R, inductive reactance \( X_L \) and capacitive reactance \( X_C \), the maximum current '\( I_0 \)' at resonance is given as :

Observe the figure and answer the following questions:

What is the function of corpus luteum?