VFA Mixed Practice Test #291

Question 1

Which enzyme, primarily secreted by the stomach, is responsible for initiating the digestion of proteins into smaller polypeptides?

Accepted Answer

C. Pepsin — Pepsin is the principal enzyme secreted by the chief cells in the stomach lining. It functions in the highly acidic environment of the stomach to break down proteins into smaller polypeptides. Amylase digests carbohydrates, lipase digests fats, and trypsin is a pancreatic enzyme that continues protein digestion in the small intestine.

Answer

A. Amylase

Answer

B. Lipase

Answer

D. Trypsin

Question 2

Kerala FACT (fertilizer):

Accepted Answer

Travancore headquartered — Fertilisers and Chemicals Travancore, Udyogamandal.

Answer

Bihar

Answer

UP

Answer

Gujarat

Question 3

A teacher following a constructivist approach in a science classroom would primarily:

Accepted Answer

C. Facilitate student-led investigations and collaborative problem-solving. — Constructivism emphasizes that learners actively construct their own understanding and knowledge. Therefore, a constructivist teacher acts as a facilitator, guiding students through investigations and encouraging collaborative problem-solving, rather than simply transmitting information or relying on rote learning. Options A, B, and D represent more traditional, transmissive models of education.

Answer

A. Deliver lectures to transmit factual information efficiently.

Answer

B. Provide structured worksheets for students to complete individually.

Answer

D. Assess learning through rote memorization of concepts and definitions.

Question 4

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

No knowledge

Answer

Physical world real

Question 5

Which of the following statements best describes the phenomenon of nuclear fusion as observed in stars like the Sun?

Accepted Answer

B. Fusion requires extremely high temperatures and pressures to overcome electrostatic repulsion between positively charged nuclei — Nuclear fusion in stars like the Sun involves combining light nuclei (e.g., hydrogen isotopes) under extreme temperatures (~15 million K) and pressures to overcome Coulomb repulsion, forming helium and releasing energy. Option A describes fission, C refers to neutron capture (e.g., in stellar nucleosynthesis), and D describes ionization, not energy-releasing fusion.

Answer

A. Fusion occurs when heavy nuclei split into smaller nuclei, releasing energy as per E = mc²

Answer

C. Fusion involves the absorption of neutrons by light nuclei, leading to the formation of heavier elements

Answer

D. Fusion is a process where electrons are stripped from nuclei, creating a plasma state without energy release

Question 6

Fear of water:

Accepted Answer

Hydrophobia — Hydrophobia. Also symptom of rabies.

Answer

Acrophobia

Answer

Claustrophobia

Answer

Pyrophobia

Question 7

Vakkom Abdul Khader Moulavi started which newspaper?‌​‍

Accepted Answer

Swadeshabhimani — Vakkom Maulavi launched Swadeshabhimani at Anchuthengu in 1905.‌​‍

Answer

Deshabhimani

Answer

Mathrubhumi

Answer

Malayala Manorama

Question 8

Sundarbans famous for:‌​‍

Accepted Answer

Royal Bengal Tiger — Largest mangrove. Royal Bengal Tiger habitat.‌​‍

Answer

Nilgiri Tahr

Answer

Lion

Answer

Elephant

Question 9

A teacher is introducing a new, abstract concept in science (e.g., quantum mechanics) to a group of advanced high school students. Which strategy aligns best with a constructivist perspective that emphasizes building on prior knowledge and active engagement, rather than passive reception of information?

Accepted Answer

B. Encouraging students to explore online simulations and conduct thought experiments to develop their own understanding, with the teacher acting as a facilitator. — Constructivism posits that learners actively construct their own understanding and knowledge. Option B exemplifies this by promoting active exploration, experimentation, and personal sense-making, with the teacher facilitating the process. While options A and D can support meaningful learning, they involve more structured transmission of information, and C promotes rote learning, which is contrary to constructivist principles of active knowledge construction.

Answer

A. Providing a highly structured lecture with clear definitions and examples, followed by a quiz.

Answer

C. Breaking down the concept into smaller, sequential steps and having students memorize each part before moving on.

Answer

D. Using an advance organizer to connect the new concept to broader scientific principles the students already know.

Question 10

Which of the following body defenses is considered a NON-SPECIFIC immune response?

Accepted Answer

B. Phagocytosis by neutrophils and macrophages — Phagocytosis by neutrophils and macrophages is a non-specific immune response as it targets a wide range of pathogens without prior sensitization. Antibody production (Option A) and T-helper cell activation (Option C) are specific immune responses; memory cell formation (Option D) is a feature of adaptive immunity.

Answer

A. Production of antibodies by B lymphocytes

Answer

C. Activation of T-helper cells

Answer

D. Memory cell formation after vaccination

VFA Mixed Practice Test #291