The point mutation arise due to change in :

Sex determination in grasshopper is of -

Which of the following is not a cyanobacteria ?

ABO blood groupings are controlled by the gene I. This 'ABO' blood grouping in human beings is an example of -

Amniocentesis is not legally used to test:

Which of the following are not correct for of genetic code ?
(A) The code is degenerate
(B) The codon is triplet. There are 64 codons which code for amino acids
(C) The codon is read in a contiguous fashion
(D) The code AUG has dual functions. It codes for methionine and also acts as terminator code
Choose the correct answer from the options given below:

The unequivocal proof that DNA is the genetic material came from the experiments of -

For an astronomical telescope with 10 m focal length objective and 10 cm eyepiece, tube length and magnification are :

An emf of \( 0.5 \text{ V} \) is developed in the secondary coil, when current in primary coil changes from \( 5.0 \text{ A} \) to \( 2.0 \text{ A} \) in \( 300 \text{ milliseconds} \). The mutual inductance of two coils would be :

Consider the matrices \(A=\left[\begin{array}{ccc}9 & 0 & 0 \\ 0 & 16 & 0 \\ 0 & 0 & 25\end{array}\right]\) and \(B=\left[\begin{array}{ccc}1 / 5 & 0 & 0 \\ 0 & 1 / 4 & 0 \\ 0 & 0 & 1 / 3\end{array}\right]\). The value of \(\left|(A B)^{-1}\right|\) is

Read the paragraph given below and answer the question. if a person is born with a hereditary disease, can a corrective therapy be taken for such a disease? Gene therapy is an attempt to do this. Gene therapy is a collection of methods that allows correction of a gene defect that has been diagnosed in a child/embryo. Here genes are inserted into a person's cells and tissues to treat disease.
ADA deficiency can be permanently cured by
A. Bone Marrow Transplant
B. Gene therapy
C. Enzyme replacement therapy
D. DNA recombination
Choose the correct answer from the options given below:

Read the passage carefully and answer the questions
The chemical reactions proceed at different rates which depend on various factors like concentration, temperature, etc. Rate law is an expression which relates the rate of reaction with concentration of various reacting species in the reaction. For a first order reaction, the concentration of the reactant after time \(t\) is related with its initial concentration by the relation, \(C=C_0 e^{-k t}\). The rate constants for different orders have different expressions. For a first order reaction, \(k=\frac{2.303}{t} \log \frac{a}{a-x}\), where \(a\) is the initial concentration and \(x\) is the extent of reaction.
The quantity k in a rate law expression is

Read the following passage carefully.
Restriction enzyme
Restriction enzymes cut the strand of DNA a little away from the center of the palindrome sites, but between the same two bases on the opposite strands. This leaves single stranded portions at the ends. There are overhanging stretches called sticky ends on each strand. These are named so because they form hydrogen bonds with their complementary cut counterparts. This stickiness of the ends facilitates the action of the enzyme DNA ligase. The word palindromes refer to group of letters that forms the same words when read both forward and backward. Restriction endonucleases are used in genetic engineering as molecular scissors.
Which one of the following enzyme helps to join DNA?