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Chromosomes 'Z' and 'W' for sex determination are seen in :

Which of the following statements are not correct?
(A) The milk produced during the initial few days of lactation is called colostrum which contain several antibodies
(B) The signals for the parturition originate from the pituitary gland of the mother
(C) Parturition is induced by a complex neuroendocrine mechanism
(D) Oxytocin is released from the ovary of mother and acts on the uterine muscles
Choose the correct answer from the options given below:

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 -

Arrange the following step of PCR in correct sequence.
(A) Extension of Primer
(B) Annealing
(C) Denaturation of ds DNA
(D) Amplification
(E) Use of DNA polymerase and deoxynucleotides
Choose the correct answer from the options given below:

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.
Which of the following technique is not very useful to detect the cancers of internal organs?

Which of the following is correct about RNA ?
(A) Unstable and mutates slower
(B) Unstable and mutates faster
(C) Stable and mutates faster
(D) Stable and mutates slower
Choose the correct answer from the options given below :

Identify the statements which are correct with respect to fertilization.
(A) Sperm comes in contact with zona pellucida layer of the ovum
(B) Acrosome secretions help the sperm to pass through the cells of corona radiata
(C) Entry of sperm into the cytoplasm of ovum induces the completion of the meiotic division of the secondary oocyte
(D) Fertilization can occur if the ovum and sperms are transported simultaneously to the ampullary region
Choose the correct answer from the options given below:

\(\int x^2 \tan ^{-1} x d x\)=

The ore which cannot be concentrated by froth-flotation process is:

If white colour flower of Antirrhinum sp. successfully crossed with the pink
colour flower, what would be the proportion of white and pink color flowers
in the next generation?

The probability that a plant \(A\) survives is \(\frac{3}{4}\) and the probability that another plant \(B\) survives is \(\frac{1}{3}\).
The probability that only one of them survives is :

The oxidation state, geometry and number of unpaired electrons in \([Cr(NH_3)_6]^{3+}\) is :