What initiation and termination factors are involved in transcription in prokaryotes?

1. $\mathrm{\sigma }$ $\mathrm{and}$ $\mathrm{\rho }$, respectively

2. $\mathrm{\alpha }$ $\mathrm{and}$ $\mathrm{\beta }$, respectively

3. $\mathrm{\beta }$ $\mathrm{and}$ $\mathrm{\gamma }$, respectively

4. $\mathrm{\alpha }$ $\mathrm{and}$ $\mathrm{\sigma }$, respectively

The production of gametes by the parents the formation of zygotes, the F₁ and F₂ plants can be understood using

In which genetic condition, each cell in the affected person, has three sex chromosomes XXY?

1. Thalassemia

2. Klinefelter's Syndrome

3. Phenylketonuria

4. Turner's Syndrome

Match the following RNA polymerases with their transcribed products:

Select the correct option from the following:

Western Ghats have a large number of plant and animal species that are not found anywhere else. Which of the following terms will you use to notify such species?

Which of the following conditions will stimulate the parathyroid gland to release parathyroid hormone?

1. Fall in active Vitamin D levels

2. Fall in blood Ca²⁺ levels

3. Fall in bone Ca²⁺ levels

4. Rise in blood Ca²⁺ levels

Choose the correctly matched pair:

1. Tendon-Specialized connective tissue

2. Adipose tissue-Dense connective tissue

3. Areolar tissue- Loose connective tissue

4. Cartilage- Loose connective tissue

Match the following parts of a nephron with their function:

Select the correct option from the following:

A specialised nodal tissue embedded in the lower corner of the right atrium, close to atrio-ventricular septum, delays the spreading of impulses to heart apex for about 0.1 sec.

This delay allows -

1. blood to enter aorta.
2. the ventricles to empty completely.
3. blood to enter pulmonary arteries.
4. the atria to empty completely.