LGS Mixed Practice Test #76

Question 1

Descartes' 'cogito':

Accepted Answer

'I think, therefore I am' — starting point of Cartesian doubt — Method of systematic doubt. Rationalist. Father of modern Western philosophy. Contrast with Empiricists (Locke, Hume).

Answer

God exists

Answer

Physical world real

Answer

No knowledge

Question 2

In Excel, to add numbers in cells A1 to A10, use:‌​‍

Accepted Answer

=SUM(A1:A10) — =SUM(A1:A10) adds all values in the range. Excel formulas start with =.‌​‍

Answer

=ADD(A1:A10)

Answer

=TOTAL(A1:A10)

Answer

=PLUS(A1:A10)

Question 3

Which part of the nephron is primarily responsible for the reabsorption of most filtered water, electrolytes, and nutrients back into the bloodstream?

Accepted Answer

D. Proximal convoluted tubule — The proximal convoluted tubule (PCT) is where the majority (approximately 65-70%) of filtered water, sodium, chloride, potassium, glucose, and amino acids are reabsorbed back into the bloodstream. The glomerulus is responsible for filtration, the Loop of Henle primarily concentrates urine, and the distal convoluted tubule fine-tunes reabsorption and secretion.

Answer

A. Glomerulus

Answer

B. Loop of Henle

Answer

C. Distal convoluted tubule

Question 4

Purines in DNA:‌​‍

Accepted Answer

A and G — Double-ring. ‌​‍Pyrimidines (single-ring): C, T (in DNA), U (in RNA). Chargaff's rule: A=T, G=C.

Answer

Only A

Answer

C and T

Answer

A and T

Question 5

Reserpine, an indole alkaloid known for its antihypertensive and sedative properties, is primarily obtained from which of the following plant sources?

Accepted Answer

C. Rauwolfia serpentina — Reserpine is a key alkaloid isolated from the roots of Rauwolfia serpentina, commonly known as Sarpagandha. Cinchona yields quinine, Papaver somniferum yields opium alkaloids like morphine, and Strychnos nux-vomica yields strychnine and brucine.

Answer

A. Cinchona succirubra

Answer

B. Papaver somniferum

Answer

D. Strychnos nux-vomica

Question 6

The term 'BRICS Plus' refers to an expansion of the BRICS economic bloc. Which country was the first to be formally invited to join BRICS as part of this expansion in 2023?

Accepted Answer

D. Iran — In 2023, BRICS announced its first expansion by inviting six countries to join: Saudi Arabia, Egypt, Ethiopia, Iran, Argentina, and the UAE. However, the question asks for the first country formally invited, and among the options, Iran was the first to be publicly announced as part of the BRICS expansion. The other options were also invited but not in the initial announcement order.

Answer

A. Saudi Arabia

Answer

B. Egypt

Answer

C. Ethiopia

Question 7

In which year did the Planning Commission publish the Kerala Development Report?‌​‍

Accepted Answer

2008 — 2008 report on state model.

Answer

2000

Answer

2013

Answer

2018

Question 8

Speed of sound in air at 20°C is approximately:‌​‍

Accepted Answer

343 m/s — v = √(γP/ρ) ≈ 331 + 0.6T (°C). In water ~1482 m/s; in steel ~5960 m/s.‌​‍

Answer

330 m/s

Answer

1500 m/s

Answer

450 m/s

Question 9

Medulla oblongata:‌​‍

Accepted Answer

Involuntary functions (breath, heart) — Vital autonomic functions.‌​‍

Answer

Hearing

Answer

Memory

Answer

Vision

Question 10

Onam lottery name:‌​‍

Accepted Answer

Thiruvonam Bumper — Thiruvonam Bumper.‌​‍

Answer

Christmas Bumper

Answer

Vishu Bumper

Answer

All

LGS Mixed Practice Test #76