Which among the following cause pneumonia in human ?
(A) Streptococcus pneumoniae
(B) Wuchereria bancrofti
(C) Haemophilus influenzae
(D) Salmonella typhi
Choose the correct answer from the options given below :

Identify the correct statements about test cross.
(A). It can predict the genotype of the test organism
(B). It can distinguish homozygous and heterozygous among test organisms
(C). It is another name for back cross
(D). It is the law of dominance
Choose the correct answer from the options given below:

Match List I with List II.

LIST I	LIST II
A. Artificial insemination	I. Infertility
B. Chromosomal disorder	II. Assisted Reproductive Technologies
C. Gonorrhoea	III. Amniocentesis
D. Inability to produce children	IV. Sexually transmitted infections

Choose the correct answer from the options given below:

Identify the substance that can undergo bio-magnification in a food chain.

Nowadays, biofertilisers are available in the market. Select the correct statements regarding biofertilisers given below:
(A) Biofertilisers increase the soil fertility.
(B) Biofertilisers kill the pathogenic microbes
(C) Biofertilisers increase the iron content in the soil
(D) Biofertilisers increase the crop production.
(E) Excess use of biofertilisers causes water and soil pollution.
Choose the correct answer from the options given below:

Arrange the following steps of curd formation from milk.
(A) Coagulation and partial digestion of milk protein
(B) Growth of starter culture
(C) Growth of lactic acid bacteria (LAB) in milk
(D) A small amount of curd is added as an inoculum to fresh milk
Choose the correct answer from the options given below:

The excessive use of herbicides, pesticides etc. has resulted in selection of resistant varieties. It is an example of evolution by:

In a series LCR circuit, the voltage across \(R\) is \(200 V, C=5 \mu F\), and \(R=2 k \Omega\). The resonant frequency \(\omega\) is \(1 0 0 ~ r a d / s\). At resonance, the voltage across \(L\) is:

Answer the questions on the basis of passage given below :
As aldehydes ketones possess the carbonyl functional group, they show similar reaction They exhibit nucleophilic addition reactions, reduction, oxidations, reactions due to alpha-Hydrogen atom, and many other reactions, like Cannizzaro reaction to electrophilic substitution reactions (in case of aromatic aldehydes ketones).
These reactions help in the preparation of a number of important compounds, like acetic acid, vinyl acetate, polymers and in perfume and dye industries.
Nucleophilic addition reactions form cyanohydrins, acetals, alcohols and
N-substituted derivatives like imine, oxime, semicarbazone, phenylhydrazone Schiff's base. Reactions due to alpha-hydrogen atoms help in formation of aldols and alpha, beta-unsaturated aldehydes ketones.
Identify the final product of the following reaction :

Read the following paragraph carefully and answer the given questions.
Certain types of leukocytes (WBC) of our body like polymorpho-nuclear leukocytes (PMNL-neutrophils) and monocytes and natural killer (type of lymphocytes) in the blood as well as macrophages in tissues can phagocytose and destroy microbes. For determining the cause of allergy, the patient is exposed to or injected with very small doses of possible allergens, and the reactions studied. The use of drugs like anti-histamine, adrenalin and steroids quickly reduce the symptoms of allergy. Heroin, commonly called smack is chemically diacetylmorphine which is a white, odourless, bitter crystalline compound. This is obtained by acetylation of morphine. Techniques like radiography (use of X-rays), CT (computed tomography) and MRI (magnetic resonance imaging) are very useful to detect cancers of the internal organs. Different species of Plasmodium (P. vivax, P. malaria and P. falciparum) are responsible for different types of malaria. Of these, malignant malaria caused by Plasmodium falciparum is the most serious one and can even be fatal.
Malignant malaria is caused by -

A capacitor of unknown capacitance is connected with a battery of V volts. The charge stored in it is \( 200 \, \mu\text{C} \). When the potential of the capacitor is reduced by 100 volts, the charge stored in it becomes \( 150 \, \mu\text{C} \). The unknown capacitance is:

A carrier wave of peak voltage 24 V is used to transmit a message signal. What should be the peak voltage of the modulating signal in order to have a modulation index of 70% ?

Which of the following is an incorrect statement?