YIELD PRACTICE QUESTIONS AND STUDY GUIDE COMPLETE
ACCURATE EXAM REAL QUESTIONS AND CORRECT VERIFIED
ANSWERS WITH DETAILED RATIONALES (RELIABLE SOLUTIONS)
CURRENTLY UPDATED VERSION 2026 EDITION |GUARANTEED PASS
A+ | JUST RLEASED | INSTANT DOWNLOAD PDF
1. Which organelle is responsible for producing ATP through cellular
respiration?
A. Nucleus
B. Ribosome
C. Mitochondria — Correct Answer
D. Golgi apparatus
Rationale: Mitochondria are the "powerhouses" of the cell,
producing ATP via the Krebs cycle and electron transport chain.
The nucleus houses DNA, ribosomes synthesize proteins, and the
Golgi apparatus modifies and packages proteins.
2. In the human digestive system, where does most nutrient
absorption occur?
A. Stomach
B. Large intestine
C. Small intestine — Correct Answer
,D. Esophagus
Rationale: The small intestine, with its villi and microvilli,
provides massive surface area for nutrient absorption. The
stomach primarily breaks down food mechanically and chemically;
the large intestine mainly absorbs water and electrolytes; the
esophagus only transports food.
3. What is the chemical formula for glucose?
A. C₆H₁₂O₆ — Correct Answer
B. C₁₂H₂₂O₁₁
C. CH₄
D. CO₂
Rationale: Glucose is a monosaccharide with the formula
C₆H₁₂O₆. C₁₂H₂₂O₁₁ is sucrose (table sugar), CH₄ is methane, and
CO₂ is carbon dioxide.
4. Which of the following is a noble gas?
A. Oxygen
B. Nitrogen
C. Argon — Correct Answer
D. Chlorine
,Rationale: Argon (Ar) is in Group 18 of the periodic table, the
noble gases, characterized by full valence electron shells. Oxygen
is in Group 16, nitrogen is in Group 15, and chlorine is a halogen
in Group 17.
5. What type of bond forms when electrons are shared between
atoms?
A. Ionic bond
B. Covalent bond — Correct Answer
C. Hydrogen bond
D. Metallic bond
Rationale: Covalent bonds involve the sharing of electron pairs
between atoms. Ionic bonds involve electron transfer, hydrogen
bonds are weak attractions between molecules, and metallic bonds
involve a "sea" of delocalized electrons.
6. In which level of the atmosphere does all weather take place?
A. Troposphere — Correct Answer
B. Stratosphere
C. Mesosphere
D. Thermosphere
, Rationale: The troposphere is the lowest level of the atmosphere
and where all weather affecting Earth takes place. This is the level
where clouds form and from which precipitation falls.
7. A net force of 15 N is applied to an object that starts at rest and
accelerates to a velocity of 12 m/s in 4 seconds. What is the mass of
the object?
A. 3 kg
B. 5 kg — Correct Answer
C. 12 kg
D. 15 kg
Rationale: Use Newton's second law of motion, F = ma. The
object reached a velocity of 12 m/s in 4 seconds, so acceleration
was 12/4 = 3 m/s². 15 = m(3), so m = 15/3 = 5 kg.
8. Which of the following activities results in a chemical change?
A. Mixing salt and sugar
B. Drying wet clothes
C. Boiling a pot of water
D. Burning pieces of wood — Correct Answer