Which one of the following is not true for a molecule that can act as a genetic material?

How many haploid cells will be formed after first meiotic division of one primary spermatocyte ?

Identify the correct sequence of trophic levels in a food-chain.
(A) Man
(B) Phytoplankton
(C) Fishes
(D) Zooplankton
Choose the correct answer from the options given below:

Read the following paragraph and answer the given questions.
RNAi takes place in all eukaryotic organisms as a method of cellular defense. The source of this complementary RNA could be from an infection by viruses having RNA genomes or mobile genetic elements (transposons) that replicate via an RNA intermediate. Insulin from an animal source, though caused some patients to develop allergy or other types of reactions to the foreign protein. Insulin consists of two short polypeptide chains: chain A and chain B, that are linked together by disulphide bridges. Transgenic mice are being developed for use in testing the safety of vaccines before they are used on humans. Transgenic mice are being used to test the safety of the polio vaccine. If successful and found to be reliable, they could replace the use of monkeys to test the safety of batches of the vaccine. Specific Bt toxin genes were isolated from Bacillusthuringiensis} and incorporated into the several crop plants such as cotton. The choice of genes depends upon the crop and the targeted pest, as most Bt toxins are insect-group specific. The toxin is coded by a gene cryIAc named cry. There are a number of them, for example, the proteins encoded by the genes cryIAc and cryIIAb control the cotton bollworms, that of cryIAb controls corn borer.

The transgenic mice are being used to test the safety of which vaccine?

Arrange the following evolutionary human species in order of their appearance on earth from the current to the oldest one.
(A) Homo erectus
(B) Neanderthal man
(C) Dryopethicus
(D) Homo sapiens
Choose the correct answer from the options given below:

Which one of the given assisted reproductive technologies (ART) involves transfer of fertilized egg into the fallopian tube?

Arrange the following steps of gene therapy for Adenosine deaminase deficiency in sequence.
(A) Patients lymphocytes are grown in culture outside the body
(B) Functional ADA cDNA is introduced into lymphocytes using retroviral vector
(C) Lymphocytes are taken from the blood of the patient
(D) Genetically engineered lymphocytes introduced back to the patient body
Choose the correct answer from the options given below :

If \(x=a \sin ^3 t\) and \(y=a \cos ^3 t\), then \(\frac{d y}{d x}\) is equal to :

The first diffraction minima due to a single slit diffraction is at \(\theta=30^{\circ}\) for a light of wavelength \(5000 \AA\). The width of the slit is

Potassium (K) and Rubidium (Rb) forms

Aniline upon heating with concentrated \(HNO_3\) and concentrated \(H_2SO_4\) mixture gives:

When copper and germanium are cooled from room temperature to 100 K, then :

A cell of emf 1.1 V and internal resistance 0.5 \(\Omega\) is connected to a 0.5 \(\Omega\) wire. Another cell of same emf is added in series, but current remains unchanged. The second cell's internal resistance is :