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Biology · 100-Mark Comprehensive Assessment

Biology Comprehensive Practice Test 6

A 100-mark Biology assessment covering 0-0-11 — Cellular Respiration, Energy & Gas Exchange, 0-0-12 — Evolution, Classification & Biodiversity — progressing from foundational knowledge to application, analysis and higher-order reasoning.

EDUSAMBAM Editorial Team·45 questions · 100 marks·Basic → Advanced

Questions

100

Marks

Sections

100%

Auto-Graded

A — Multiple Choice	15	2	30
B — True / False	10	2	20
C — Fill in the Blank	10	2	20
D — Column Matching	5 pairs	2	10
E — Short Answer	5	4	20
Total	45	—	100
Total	45	—	100

Fill-in-the-blank and short-answer questions are checked automatically against accepted answers — exact wording does not need to match, but the key term should be present.

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Section A — Multiple Choice

30 marks

15 questions · 2 marks each.

1.Photosynthesis converts light energy into:Basic2 pts

A. Chemical energy stored in organic molecules

B. Heat only

C. Sound energy

D. Kinetic energy only

2.The main site of photosynthesis in plant cells is the:Basic2 pts

A. Chloroplast

B. Nucleus

C. Lysosome

D. Ribosome

3.Chlorophyll is important because it:Basic2 pts

A. Absorbs particular wavelengths of light used in photosynthesis

B. Digests starch

C. Stores DNA

D. Pumps blood

4.Carbon dioxide enters most leaves mainly through:Basic2 pts

A. Stomata

B. Xylem vessels

C. Root hairs only

D. Phloem sieve tubes

5.Xylem primarily transports:Basic2 pts

A. Water and mineral ions

B. Sugars from leaves

C. DNA

D. Oxygen to mitochondria

6.Phloem transports:Intermediate2 pts

A. Organic assimilates such as sucrose from sources to sinks

B. Only water

C. Only mineral ions

D. Only carbon dioxide

7.Transpiration is:Intermediate2 pts

A. Loss of water vapour from plant surfaces, especially leaves

B. Production of glucose

C. Uptake of carbon dioxide by roots

D. Cell division in meristems

8.A plant needs mineral ions because:Intermediate2 pts

A. They support structures and biochemical processes such as enzyme function and chlorophyll formation

B. They replace sunlight

C. They are all converted directly into glucose

D. They prevent all transpiration

9.If stomata close, a likely immediate effect is:Intermediate2 pts

A. Reduced carbon dioxide entry and reduced water loss

B. Increased carbon dioxide entry

C. Elimination of xylem flow

D. Guaranteed increase in photosynthesis

10.A factor that can limit photosynthesis is:Intermediate2 pts

A. Light intensity, carbon dioxide concentration or temperature, depending on conditions

B. Only gravity

C. Only soil colour

D. Only plant height

11.The cohesion-tension mechanism helps explain:Advanced2 pts

A. Upward movement of water in xylem associated with transpiration and cohesive water molecules

B. Sugar movement in phloem only

C. DNA replication

D. Protein synthesis

12.Source-to-sink translocation in phloem means:Advanced2 pts

A. Sugars are moved from producing or exporting tissues to tissues that use or store them

B. Water always moves from leaves to roots only

C. Minerals move through chloroplasts

D. Carbon dioxide is transported in xylem

13.A plant with adequate light but very low magnesium may have reduced photosynthesis because:Advanced2 pts

A. Magnesium is important in chlorophyll structure

B. Magnesium replaces carbon dioxide

C. Magnesium is the main sugar

D. Magnesium closes every stomata permanently

14.Why can a plant grow faster in one environment than another even with the same species?Advanced2 pts

A. Light, water, nutrients, temperature, carbon dioxide and other conditions can alter limiting factors

B. Species identity determines every response completely

C. Plants do not respond to environment

D. Only soil colour matters

15.Which statement best integrates plant nutrition and transport?Advanced2 pts

A. Roots acquire water/minerals, leaves capture carbon, and vascular tissues distribute materials needed for growth and metabolism

B. Leaves obtain all minerals directly from sunlight

C. Xylem makes glucose

D. Phloem transports only oxygen

Section B — True / False

20 marks

10 questions · 2 marks each.

16.Plants require carbon dioxide for photosynthesis.Basic2 pts

True

False

17.Photosynthesis occurs only in roots.Basic2 pts

True

False

18.Xylem is associated mainly with water and mineral transport.Basic2 pts

True

False

19.Phloem can transport sugars away from leaves.Basic2 pts

True

False

20.Transpiration is identical to photosynthesis.Basic2 pts

True

False

21.Stomata regulate gas exchange and can influence water loss.Intermediate2 pts

True

False

22.All mineral ions are required by plants in exactly the same quantities.Intermediate2 pts

True

False

23.Increasing light intensity always increases photosynthesis without limit.Advanced2 pts

True

False

24.Water loss from leaves can contribute to upward water movement through xylem.Advanced2 pts

True

False

25.A plant's growth depends only on photosynthesis and not on mineral nutrition.Advanced2 pts

True

False

Section C — Fill in the Blank

20 marks

10 questions · 2 marks each. Type the missing word or term.

26.The green pigment that absorbs light for photosynthesis is ______.Intermediate2 pts

27.The openings that regulate gas exchange in leaves are called ______.Intermediate2 pts

28.The vascular tissue that transports water and mineral ions is ______.Intermediate2 pts

29.The vascular tissue that transports sugars is ______.Intermediate2 pts

30.Loss of water vapour from leaves is called ______.Intermediate2 pts

31.Plants use carbon dioxide and water to produce organic molecules during ______.Advanced2 pts

32.The tissue containing many chloroplasts beneath the upper epidermis is the ______ mesophyll.Advanced2 pts

33.Tiny extensions of root epidermal cells that increase absorption surface area are root ______.Advanced2 pts

34.Movement of sugars through phloem from sources to sinks is called ______.Advanced2 pts

35.A mineral element required in relatively large amounts is a ______nutrient.Advanced2 pts

Section D — Column Matching

10 marks

Use the ▲ ▼ buttons to reorder Column B until each row lines up with the correct term in Column A. 2 marks per correct pair.

36–40.Match each term in Column A with the correct description in Column B.Advanced10 pts

Column A

Stomata

Xylem

Phloem

Chlorophyll

Transpiration

Column B

B. Water and mineral transport

C. Assimilate transport

D. Light-absorbing pigment

E. Water vapour loss

A. Regulate leaf gas exchange

Section E — Short Answer

20 marks

5 questions · 4 marks each. Answer in one or two sentences.

41.Explain how stomata create a trade-off between carbon dioxide uptake and water conservation.Advanced4 pts

42.Describe the path of water from soil to the site of photosynthesis.Advanced4 pts

43.Why can mineral deficiency reduce photosynthesis even when light and carbon dioxide are adequate?Advanced4 pts

44.Explain why xylem and phloem are functionally different transport systems.Advanced4 pts

45.A greenhouse has strong light but photosynthesis stops increasing above a certain light level. Give a biological explanation.Advanced4 pts

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