The length and breadth of a rectangular field are in the ratio of 3 : 2. If the perimeter of the field is 80m, its breadth (in metres) is :

TLS Online TPP Program

#Question id: 34166

#Unit 7. System Physiology – Animal

I. Adrenocortical secretion is controlled primarily by ACTH, from the anterior pituitary, but mineralocorticoid secretion is also subject to independent control by circulating factors.

II. Adrenal medullary hormones work mostly to prepare the body for emergencies, the so-called “fight-or-flight” responses.

III. All three cortical zones secrete corticosterone, but the active enzymatic mechanism for aldosterone biosynthesis is not limited to the zona glomerulosa.

IV. An important function of the zona glomerulosa, in addition to aldosterone synthesis, is the formation of new cortical cells.

TLS Online TPP Program

#Question id: 34167

#Unit 7. System Physiology – Animal

I. The adrenal medulla does not regenerate, but when the inner two zones of the cortex are removed, a new ZF and ZR regenerate from glomerular cells attached to the capsule.

II. Immediately after hypophysectomy, the ZF and ZR begin to atrophy, whereas the ZG is unchanged because of the action of angiotensin II on this zone. 

III. The ability to secrete aldosterone and conserve Na+ is normal for some time after hypophysectomy, but in longstanding hypopituitarism, aldosterone deficiency may develop, apparently because of the absence of a pituitary factor that maintains the responsiveness of the zona glomerulosa. 

TLS Online TPP Program

#Question id: 34168

#Unit 7. System Physiology – Animal

Angiotensin II stimulates aldosterone production in the zona glomerulosa by binding to AT1 receptors. Which of the following best describes the intracellular signaling pathway and its role in aldosterone biosynthesis?

TLS Online TPP Program

#Question id: 34169

#Unit 7. System Physiology – Animal

Based on the provided graph panels (A–D), which of the following statements is INCORRECT?

TLS Online TPP Program

#Question id: 34170

#Unit 3. Fundamental Processes

What is correct about Klenow fragment

A. is a single polypeptide of 103 kD

B. larger cleavage product of DNA Pol I of 68 kD

C. It contains the polymerase activity

D. It contains the 3’-5’ exonuclease activity

E. It contains the 5’-3’ exonuclease activity

TLS Online TPP Program

#Question id: 34171

#Unit 3. Fundamental Processes

If the rate of fidelity of replication in bacteria is 10^-9/bp. How many replications it would take to make a mistake?