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Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R): Assertion (A): Breast-feeding during initial period of infant growth is recommended by doctors for bringing a healthy baby. Reason (R): Colostrum contains several antibodies absolutely essential to develop resistance in the new born baby. In the light of the above statements, choose the most appropriate answer from the options given below:
If the principal quantum number n=6, the correct sequence of filling of electrons will be:
Which one of the following organisms bears hollow and pneumatic long bones?
Progesterone alone or in combination with estrogen can also be used as contraceptives by females as injections or implants under their skin. When used in this manner, they:
As the temperature increases, the electrical resistance:
Chargaff's rule states that in an organism:
Given below are two statements: Statement I: Transfer RNAs and ribosomal RNA do not interact with mRNA. Statement II: RNA interference (RNAi) takes place in all eukaryotic organisms as a method of cellular defence. In the light of the above statements, choose the most appropriate answer from the options given below:
An automobile moves on a road with a speed of $54 \text{ km h}^{-1}$. The radius of its wheels is $0.45 \text{ m}$ and the moment of inertia of the wheel about its axis of rotation is $3 \text{ kg m}^2$. If the vehicle is brought to rest in $15 \text{ s}$, the magnitude of average torque transmitted by its brakes to the wheel is:
What are those structures that appear as 'beads-on-string' in the chromosomes when viewed under an electron microscope?
Match the following sexually transmitted diseases (Column - I) with their causative agent (Column - II) and select the correct option. Column I A. Gonorrhoea B. Syphilis C. Genital Warts D. AIDS Column II i. HIV ii. Neisseria iii. Treponema iv. Human Papilloma Virus
All of the following are part of an operon except:
An ideal gas is compressed to half its initial volume by means of several processes. Which of the following processes results in the maximum work being done on the gas?
Types of RNA polymerase required in the nucleus for RNA synthesis:
Identify the meiotic stage in which the homologous chromosomes separate while the sister chromatids remain associated at their centromeres.
E. coli about to replicate was placed in a medium containing radioactive thymidine for five minutes. Then, it was made to replicate in a normal medium. Which of the following observation shall be correct?
1 g of water of volume $1 \text{ cm}^3$ at $100^{\circ}\text{C}$ is converted into steam at the same temperature under normal atmospheric pressure $\approx 1 \times 10^5 \text{ Pa}$. The volume of steam formed equals $1671 \text{ cm}^3$. If the specific latent heat of vaporization of water is $2256 \text{ J/g}$, the change in internal energy is:
With reference to Hershey and Chase experiments, select the correct statements: A: Viruses grown in the presence of radioactive phosphorus contained radioactive DNA. B: Viruses grown on radioactive sulphur contained radioactive proteins. C: Viruses grown on radioactive phosphorus contained radioactive protein D: Viruses grown on radioactive sulphur contained radioactive DNA E: Viruses grown on radioactive protein contained radioactive DNA
If the mass of the sun were ten times smaller and the universal gravitational constant were ten times larger in magnitude, which of the following statements would not be correct?
PCR and Restriction Fragment Length Polymorphism are the methods for:
Pneumatophores occur in