LGS Mixed Practice Test #420

Question 1

A teacher in a Kerala government school observes that one of her students, a child with low vision, is struggling to read the blackboard from the back of the classroom. Which of the following inclusive practices should the teacher prioritize first?

Accepted Answer

B. Providing the child with a magnifying glass and ensuring seating closer to the blackboard. — Inclusive education focuses on adapting the environment and teaching methods to meet the needs of all students within the mainstream classroom. Providing a magnifying glass and ensuring appropriate seating are direct, practical, and reasonable accommodations that allow the child to access the learning material independently. Other options either promote segregation, lower expectations, or create undue dependency, which are not primary inclusive practices.

Answer

A. Suggesting to the parents that they consider enrolling the child in a special school for visually impaired children.

Answer

C. Giving the child simplified assignments and exempting them from blackboard-based activities.

Answer

D. Asking a classmate to constantly assist the child by reading out everything written on the blackboard.

Question 2

Which of the following physiological systems, primarily initiated and regulated by the kidneys, is most crucial for the long-term maintenance of arterial blood pressure and fluid balance?

Accepted Answer

C. The Renin-Angiotensin-Aldosterone System (RAAS), influencing vasoconstriction and sodium reabsorption. — The Renin-Angiotensin-Aldosterone System (RAAS) is initiated by the kidneys releasing renin in response to decreased blood pressure or volume. This cascade leads to the production of angiotensin II, a potent vasoconstrictor, and the secretion of aldosterone, which promotes sodium and water reabsorption, thereby directly impacting long-term blood pressure and fluid balance. Options A and D represent short-term neural regulatory mechanisms, while option B, ADH, primarily regulates water reabsorption and is not primarily initiated by the kidneys for comprehensive long-term blood pressure regulati

Answer

A. The baroreceptor reflex, by sensing changes in arterial stretch.

Answer

B. The secretion of antidiuretic hormone (ADH) from the posterior pituitary.

Answer

D. The sympathetic nervous system, by altering cardiac output and peripheral resistance.

Question 3

Beriberi is caused by the deficiency of:‌​‍

Accepted Answer

Vitamin B1 — Beriberi is caused by Vitamin B1 (Thiamine) deficiency. ‌​‍It affects the nervous system and heart.

Answer

Vitamin A

Answer

Vitamin C

Answer

Vitamin D

Question 4

Symbol of Gold:‌​‍

Accepted Answer

Au — Au (Latin: Aurum). Ag = Silver.‌​‍

Answer

Go

Answer

Gd

Answer

Ag

Question 5

Cardiac glycosides like Digoxin are known for their positive inotropic effect, which increases the force of myocardial contraction. This effect primarily involves:

Accepted Answer

B. Inhibiting the Na+/K+-ATPase pump. — Cardiac glycosides inhibit the Na+/K+-ATPase pump in cardiac muscle cells, leading to increased intracellular sodium. This in turn reduces the activity of the Na+/Ca2+ exchanger, resulting in increased intracellular calcium, which enhances myocardial contractility.

Answer

A. Blocking beta-adrenergic receptors.

Answer

C. Increasing cyclic AMP levels.

Answer

D. Dilating peripheral blood vessels.

Question 6

Anamudi, the highest peak in peninsular India, is located in:

Accepted Answer

Anaimalai hills (Kerala) — Anamudi (2,695 m) in the Anaimalai hills of Kerala is the tallest peak south of the Himalayas.

Answer

Nilgiris

Answer

Cardamom Hills

Answer

Western Ghats of Karnataka

Question 7

Fleming's Right-Hand Rule applies to:‌​‍

Accepted Answer

Generators (induced EMF direction) — Right-hand rule gives the direction of induced current in a generator.‌​‍

Answer

Transformers

Answer

Electric motors

Answer

Capacitors

Question 8

Aristotle called humans:‌​‍

Accepted Answer

Political animal (zoon politikon) — Aristotle in 'Politics' called man a 'zoon politikon' — naturally inclined to live in a polis (city-state).‌​‍

Answer

Economic animal

Answer

Rational animal

Answer

Social animal only

Question 9

Osmotic pressure π:‌​‍

Accepted Answer

π = CRT (van't Hoff equation) — Colligative property. ‌​‍Isotonic solutions have same π. Saline IV fluid is isotonic with blood.

Answer

π = RT

Answer

π = V/T

Answer

π = P

Question 10

LED works on principle of:

Accepted Answer

Electroluminescence — photon emission on recombination — Direct bandgap semiconductors (GaAs, GaN). Energy of photon ≈ bandgap. Nobel 2014 for blue LED.

Answer

Thermionic emission

Answer

Photoelectric effect

Answer

Diffraction

LGS Mixed Practice Test #420