VFA Mixed Practice Test #132

Question 1

Which part of the respiratory system is responsible for the exchange of oxygen and carbon dioxide between the air and the blood?

Accepted Answer

C. Alveoli — The alveoli are tiny air sacs in the lungs where gas exchange occurs. The trachea and bronchi are air passageways, while the pharynx is part of the upper respiratory tract and does not participate in gas exchange.

Answer

A. Trachea

Answer

B. Bronchi

Answer

D. Pharynx

Question 2

The binomial system of nomenclature was developed by:‌​‍

Accepted Answer

Carl Linnaeus — Linnaeus (1753) introduced the genus-species binomial system (e.g., Homo sapiens).‌​‍

Answer

Aristotle

Answer

Gregor Mendel

Answer

Charles Darwin

Question 3

Prokaryotic cells lack:

Accepted Answer

Membrane-bound nucleus and organelles — Bacteria, archaea. Have 70S ribosomes. Circular DNA in nucleoid. No ER, Golgi, mitochondria.

Answer

Cell wall

Answer

Ribosomes

Answer

DNA

Question 4

Which of the following is a key recommendation of the NEP 2020 regarding the teaching of mother tongue or local language in schools?

Accepted Answer

A. It should be mandatory till Grade 5, with flexibility thereafter. — The NEP 2020 emphasizes multilingualism and suggests that the medium of instruction should be the mother tongue or local language up to Grade 5, with flexibility for continuation beyond. It does not mandate sole use of local languages or phase out mother tongue instruction prematurely.

Answer

B. It should be the sole medium of instruction in all government schools.

Answer

C. It should be completely phased out in favor of English.

Answer

D. It should be introduced only at the university level.

Question 5

Kepler's third law: T² ∝:

Accepted Answer

r³ — T² = 4π²r³/(GM). Basis of planetary period-distance relationship.

Answer

r

Answer

r²

Answer

r⁴

Question 6

Lactose, a disaccharide found in milk, is composed of which two monosaccharide units?

Accepted Answer

B. Glucose and Galactose — Lactose is a disaccharide formed by a glycosidic bond between one molecule of glucose and one molecule of galactose. It is commonly known as 'milk sugar'. Sucrose (table sugar) is glucose and fructose, while maltose is two glucose units.

Answer

A. Glucose and Fructose

Answer

C. Glucose and Glucose

Answer

D. Fructose and Galactose

Question 7

A patient is experiencing an adverse reaction to a medication, which is most likely due to an idiosyncratic reaction. What is the most appropriate action to take?

Accepted Answer

B. Discontinue the medication and monitor the patient's condition — Idiosyncratic reactions are unpredictable and may be life-threatening. The most appropriate action is to discontinue the medication and monitor the patient's condition. Options A, C, and D may worsen the reaction or are not relevant to idiosyncratic reactions.

Answer

A. Administer an antidote to reverse the reaction

Answer

C. Increase the dose of the medication to overcome the reaction

Answer

D. Switch to a different medication in the same class

Question 8

In the modern periodic table, how do electronegativity and metallic character generally change as one moves from left to right across a period?

Accepted Answer

B. Electronegativity tends to increase, while metallic character tends to decrease. — Across a period from left to right, the nuclear charge increases and the atomic radius generally decreases, leading to a stronger attraction for valence electrons, hence electronegativity increases. Concurrently, the tendency to lose electrons decreases, and the tendency to gain electrons increases, causing the metallic character to decrease and non-metallic character to increase.

Answer

A. Both electronegativity and metallic character tend to increase.

Answer

C. Electronegativity tends to decrease, while metallic character tends to increase.

Answer

D. Both electronegativity and metallic character tend to decrease.

Question 9

The basic functional unit of the kidney, responsible for filtering blood and producing urine, is known as the:

Accepted Answer

D. Nephron — The nephron is the microscopic structural and functional unit of the kidney, where blood filtration and urine formation occur. The glomerulus is a capillary network within the nephron, the renal pelvis collects urine from the nephrons, and the ureter transports urine from the kidney to the bladder.

Answer

A. Glomerulus

Answer

B. Renal pelvis

Answer

C. Ureter

Question 10

In which year was Kerala declared a fully literate state?‌​‍

Accepted Answer

1991 — Kerala was declared the first fully-literate state of India on 18 April 1991.‌​‍

Answer

1989

Answer

1990

Answer

1992

VFA Mixed Practice Test #132