Biology & Chemistry Teacher Exam - Free online Practice Test

Biology & Chemistry Teacher Exam

Free online Practice Test

⏱️ 1 hour 30 minutes 📋 50 MCQs ⭐ 100 Marks 📝 Instant Marking

❓ How to Use This Practice Exam

1. Start automatically – the 90‑minute timer begins as soon as the page loads.
2. Navigate questions using the Previous / Next buttons or the numbered grid. Only one question is shown at a time.
3. Select your answer by clicking on any option. Your choice is saved instantly.
4. Submit when you are ready (or when the timer runs out). After submission you will see your score, a detailed breakdown of every question, and the plain‑text answer key.
5. Review correct answers – each question will reveal the correct answer, and the breakdown shows your answer vs. correct answer.

📊 Marking Scheme

Questions 1‑30: 1 mark each  |  Questions 31‑40: 3 marks each  |  Questions 41‑50: 4 marks each

Total possible marks: 100

90:00

📌 Question Navigator

Question 1 1 Mark

Plants receive their nutrients mainly from:

A. Air B. Water C. Soil D. Sunlight

✅ Correct Answer: C

Question 2 1 Mark

Which organelle is known as the powerhouse of the cell?

A. Nucleus B. Ribosome C. Mitochondrion D. Golgi apparatus

✅ Correct Answer: C

Question 3 1 Mark

One of the following is not a function of bones:

A. Support B. Protection C. Contraction D. Blood cell production

✅ Correct Answer: C

Question 4 1 Mark

Ordinary table salt is sodium chloride. What is baking soda?

A. Sodium carbonate B. Sodium bicarbonate C. Potassium nitrate D. Calcium carbonate

✅ Correct Answer: B

Question 5 1 Mark

Pine, fir, spruce, cedar, larch and cypress belong to:

A. Angiosperms B. Gymnosperms C. Pteridophytes D. Bryophytes

✅ Correct Answer: B

Question 6 1 Mark

Pollination is best defined as:

A. Fusion of gametes B. Transfer of pollen from anther to stigma C. Seed dispersal D. Germination of pollen

✅ Correct Answer: B

Question 7 1 Mark

Movement of a cell against the concentration gradient is called:

A. Diffusion B. Osmosis C. Active transport D. Facilitated diffusion

✅ Correct Answer: C

Question 8 1 Mark

What is a catalyst?

A. A substance that speeds up the reaction B. A substance that can speed up or slow down the reaction C. A substance that slows down the reaction D. None of the above

✅ Correct Answer: B

Question 9 1 Mark

The electronic configuration of Iron (Fe, Z=26) is:

A. [Ar] 3d⁶ 4s² B. [Ar] 3d⁷ 4s¹ C. [Ar] 3d⁵ 4s² 4p¹ D. [Ar] 3d⁸ 4s⁰

✅ Correct Answer: A

Question 10 1 Mark

Classify the organic compound CH₃−CH₂−CH₂−CH₃:

A. Alicyclic B. Aromatic C. Aliphatic D. Ionic

✅ Correct Answer: C

Question 11 1 Mark

Observe the following compound: CH₃COO⁻ Na⁺. How would you classify it?

A. Alicyclic B. Aromatic C. Aliphatic D. Ionic

✅ Correct Answer: D

Question 12 1 Mark

Which organ in the body can process pain but cannot feel it?

A. Skin B. Brain C. Heart D. Liver

✅ Correct Answer: B

Question 13 1 Mark

The body of all complex animals consists of _____ basic types of tissue(s).

A. 2 B. 3 C. 4 D. 5

✅ Correct Answer: C

Question 14 1 Mark

Which cells make new bones?

A. Osteoclasts B. Osteoblasts C. Chondrocytes D. Fibroblasts

✅ Correct Answer: B

Question 15 1 Mark

Which part of the plant cell is mainly used for storage?

A. Nucleus B. Vacuole C. Chloroplast D. Cell wall

✅ Correct Answer: B

Question 16 1 Mark

Which gas is released during photosynthesis?

A. CO₂ B. N₂ C. O₂ D. H₂

✅ Correct Answer: C

Question 17 1 Mark

The primary oxygen‑carrying substance in human red blood cells is:

A. Hemoglobin B. Hemocyanin C. Hemerythrin D. Myoglobin

✅ Correct Answer: A

Question 18 1 Mark

White blood cells are collectively referred to as:

A. Erythrocytes B. Leukocytes C. Thrombocytes D. Lymphocytes

✅ Correct Answer: B

Question 19 1 Mark

The smallest of the formed elements of the blood are the:

A. Erythrocytes B. Leukocytes C. Platelets D. Plasma cells

✅ Correct Answer: C

Question 20 1 Mark

In which cerebral lobe is the speech center (Broca's area) located?

A. Frontal lobe B. Parietal lobe C. Temporal lobe D. Occipital lobe

✅ Correct Answer: A

Question 21 1 Mark

Which element has the highest electronegativity?

A. Oxygen B. Fluorine C. Chlorine D. Nitrogen

✅ Correct Answer: B

Question 22 1 Mark

Which of the following is an example of symbiosis?

A. Predation B. Lichen C. Competition D. Parasitism alone

✅ Correct Answer: B

Question 23 1 Mark

The physical appearance of an organism, resulting from its genetic makeup, is called the:

A. Genotype B. Phenotype C. Karyotype D. Biotype

✅ Correct Answer: B

Question 24 1 Mark

If a heterozygous male (Aa) mates with a heterozygous female (Aa) for an autosomal trait, what percent of their offspring are expected to be heterozygous?

A. 25% B. 50% C. 75% D. 100%

✅ Correct Answer: B

Question 25 1 Mark

Pure (R)‑2‑butanol has a specific rotation of −13.5°. A mixture of its enantiomers shows a rotation of −5.4°. What percent of the mixture is (S)‑2‑butanol?

A. 30% B. 40% C. 60% D. 70%

✅ Correct Answer: A

Question 26 1 Mark

Bond dissociation energy is the amount of energy required to:

A. Break a bond B. Form a bond C. Ionise an atom D. Excite an electron

✅ Correct Answer: A

Question 27 1 Mark

Determine the relationship between (2R,3R)‑butane‑2,3‑diol and (2S,3S)‑butane‑2,3‑diol:

A. Enantiomers B. Diastereomers C. Structural isomers D. None of the above

✅ Correct Answer: A

Question 28 1 Mark

Given the reaction steps: A → B (ΔH = +40 kJ) and B → C (ΔH = −60 kJ). What is the overall enthalpy change for A → C?

A. −20 kJ B. +20 kJ C. −100 kJ D. +100 kJ

✅ Correct Answer: A

Question 29 1 Mark

Which of the following free radicals is the most stable?

A. CH₃• B. CH₃CH₂• C. (CH₃)₂CH• D. (CH₃)₃C•

✅ Correct Answer: D

Question 30 1 Mark

The product of atomic mass and specific heat is approximately 6.4. This information was provided by:

A. Dalton B. Dulong and Petit C. Avogadro D. Mendeleev

✅ Correct Answer: B

Question 31 3 Marks

Which of the following is not a true amphibian?

A. Frog B. Toad C. Salamander D. Crocodile

✅ Correct Answer: D

Question 32 3 Marks

Which part of the brain regulates respiration in humans?

A. Cerebrum B. Medulla oblongata C. Cerebellum D. Thalamus

✅ Correct Answer: B

Question 33 3 Marks

Atoms with the same atomic number but different mass numbers are called:

A. Isobars B. Isotopes C. Isotones D. Isomers

✅ Correct Answer: B

Question 34 3 Marks

What is the pH of a neutral aqueous solution at 25°C?

A. 0 B. 7 C. 14 D. 1

✅ Correct Answer: B

Question 35 3 Marks

The subatomic particle that has no electric charge is the:

A. Proton B. Neutron C. Electron D. Positron

✅ Correct Answer: B

Question 36 3 Marks

Mixtures are broadly classified into:

A. Homogeneous and heterogeneous B. Elements and compounds C. Solutes and solvents D. Metals and non‑metals

✅ Correct Answer: A

Question 37 3 Marks

Which of the following reactions is a decomposition reaction?

A. 2H₂ + O₂ → 2H₂O B. CaCO₃ → CaO + CO₂ C. HCl + NaOH → NaCl + H₂O D. Zn + CuSO₄ → ZnSO₄ + Cu

✅ Correct Answer: B

Question 38 3 Marks

What is the percent composition by mass of salt in a 100 g solution that contains 20 g of salt?

A. 10% B. 20% C. 40% D. 80%

✅ Correct Answer: B

Question 39 3 Marks

Hydrocarbons are organic compounds made up of:

A. Carbon and oxygen B. Carbon, hydrogen, and oxygen C. Carbon and hydrogen D. Carbon and chlorine

✅ Correct Answer: C

Question 40 3 Marks

Why does butane have a higher boiling point than propane?

A. Butane exhibits hydrogen bonding B. Butane has a larger molecular size and stronger van der Waals forces C. Butane is more polar D. Propane has a higher molar mass

✅ Correct Answer: B

Question 41 4 Marks

The larva of a frog is called a:

A. Nymph B. Tadpole C. Caterpillar D. Maggot

✅ Correct Answer: B

Question 42 4 Marks

What part of the cell covering do plant cells have that animal cells lack?

A. Cell membrane B. Nucleus C. Cell wall D. Mitochondria

✅ Correct Answer: C

Question 43 4 Marks

Which of the following is NOT a type of simple epithelial tissue?

A. Simple squamous B. Simple cuboidal C. Simple columnar D. Stratified squamous

✅ Correct Answer: D

Question 44 4 Marks

In a case of incomplete dominance, the phenotypic ratio of a monohybrid cross is:

A. 3∶1 B. 1∶2∶1 C. 9∶3∶3∶1 D. 1∶1

✅ Correct Answer: B

Question 45 4 Marks

Who are most likely to get a tapeworm infection?

A. People who eat well‑cooked meat B. People who consume raw or undercooked meat C. Vegetarians D. People who drink boiled water

✅ Correct Answer: B

Question 46 4 Marks

In a dihybrid cross, the expected phenotypic ratio in the F₂ generation is:

A. 1∶2∶1 B. 3∶1 C. 9∶3∶3∶1 D. 1∶1∶1∶1

✅ Correct Answer: C

Question 47 4 Marks

Based on their origin, polymers are classified as:

A. Natural, synthetic, and semi‑synthetic B. Thermoplastic and thermosetting C. Addition and condensation D. Linear and branched

✅ Correct Answer: A

Question 48 4 Marks

All of the following are uses of transition metals EXCEPT:

A. Catalysts in chemical reactions B. Pigments in paints C. Electrical insulation D. Alloy production

✅ Correct Answer: C

Question 49 4 Marks

Which of the following is a characteristic of enzymes?

A. They are consumed in the reaction B. They lower the activation energy C. They are non‑specific D. They function equally at any pH

✅ Correct Answer: B

Question 50 4 Marks

Which of the following is a teaching method?

A. Lecture B. Discussion C. Demonstration D. All of the above

✅ Correct Answer: D

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