Alien DNA can be introduced in the animal host cell by :

Which of the following is not true about tRNA?

Gel electrophoresis can separate the DNA fragments because :
(A) Agarose gel has sieving effect
(B) DNA fragments are positively charged.
(C) DNA fragments are of different size.
(D) DNA fragments can move in an electric field.
Choose the correct answer from the options given below :

Read the following passage carefully and answer the given questions. During anaerobic sludge digestion, bacteria produce a mixture of gases such as methane, hydrogen sulphide and carbon dioxide. These gases form biogas and can be used as source of energy as it is inflammable. The bioactive molecule, cyclosporin A, that is used as an immunosuppressive agent in organ-transplant patients, is produced by the fungus Trichoderma polysporum. You must have noticed that bottled fruit juices bought from the market are clearer as compared to those made at home. This is because the bottled juices are clarified by the use of pectinases and proteases. Statins produced by the yeast Monascus purpureus have been commercialised as blood-cholesterol lowering agents. It acts by competitively inhibiting the enzyme responsible for synthesis of cholesterol. The BOD test measures the rate of uptake of oxygen by microorganisms in a sample of water and thus, indirectly, BOD is a measure of the organic matter present in the water.
Statins, used as blood-cholesterol lowering agents are produced by -

In a Mendelian dihybrid cross between a pea plant that has seeds with yellow color and round shape (RRYY) and another one that has seeds with green color and wrinkled shape (rryy), select the possible phenotypes obtained on self pollination after F\(_{1}\) generation.
(A) Round yellow
(B) Round green
(C) Wrinkled yellow
(D) Wrinkled brown
Choose the correct answer from the options given below:

Residual and persistent nucellus present in some seeds is called:

Read the following passage carefully and answer the given questions. During anaerobic sludge digestion, bacteria produce a mixture of gases such as methane, hydrogen sulphide and carbon dioxide. These gases form biogas and can be used as source of energy as it is inflammable. The bioactive molecule, cyclosporin A, that is used as an immunosuppressive agent in organ-transplant patients, is produced by the fungus Trichoderma polysporum. You must have noticed that bottled fruit juices bought from the market are clearer as compared to those made at home. This is because the bottled juices are clarified by the use of pectinases and proteases. Statins produced by the yeast Monascus purpureus have been commercialised as blood-cholesterol lowering agents. It acts by competitively inhibiting the enzyme responsible for synthesis of cholesterol. The BOD test measures the rate of uptake of oxygen by microorganisms in a sample of water and thus, indirectly, BOD is a measure of the organic matter present in the water.
The bottled juices are clarified by the combination of -

If \(\vec{a}=3 \hat{i}-6 \hat{j}+\hat{k}\) and \(\vec{b}=2 \hat{i}-4 \hat{j}+\lambda \hat{k}\) are such that \(\vec{a} \| \vec{b}\), then \(3 \lambda+2=\)

If \(f: R \rightarrow R\) is defined by f(x) = sin x + x then f(f(x)) is:

A. If the ionisation energy of hydrogen atom is 13.6 eV then its ionisation potential is 13.6 V.
B. All the setries of hydrogen spectrum have their respective shortest wavelength line corresponding to n = \(\infty\).
C. Paschen, Brackett and Pfund series all the three series are obtained in UV region.
D. The total energy of an electron is equal to the negative of its kinetic energy in the same orbit.
Choose the most appropriate answer from the options given below:

The direction ratios of the line perpendicular to the lines \(\frac{x-5}{2}=\frac{y+11}{-3}=\frac{z+3}{1}\) and \(\frac{x-7}{1}=\frac{y+2}{2}=\frac{z-4}{-2}\) are proportional to :

If \(U_E=\) electric field energy density and \(U_m=\) magnetic field energy density, then

The solution of the differential equation \(\frac{d y}{d x}=\sqrt{\frac{y}{x}}\) is