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Plant Kingdom Practice Questions

Class 11 · Biology · 2178 free MCQs with instant results and detailed explanations.

2178
Total
682
Easy
1084
Medium
412
Hard

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Topics in Plant Kingdom

Bryophytes 446
Pteridophytes 443
Angiosperms 421
Algae 436
Gymnosperms 432

Sample Questions from Plant Kingdom

Here are 10 sample questions. Start a quiz to get randomized questions with scoring.

Q1
Easy
Which group of algae is known for their red pigments?
A. Red Algae
B. Green Algae
C. Brown Algae
D. Blue-Green Algae
Show Answer & Explanation
Correct Answer: A
Red algae contain phycoerythrin, which gives them their characteristic red color.
Q2
Easy
What is the primary photosynthetic pigment in green algae?
A. Chlorophyll a
B. Carotenoids
C. Phycoerythrin
D. Chlorophyll b
Show Answer & Explanation
Correct Answer: A
Green algae primarily contain chlorophyll a, which is essential for photosynthesis.
Q3
Easy
Which of the following is a characteristic feature of blue-green algae?
A. They are eukaryotic
B. They have chlorophyll a
C. They reproduce sexually
D. They are multicellular
Show Answer & Explanation
Correct Answer: B
Blue-green algae, or cyanobacteria, have chlorophyll a as their primary pigment.
Q4
Medium
Which of the following is a characteristic feature of red algae?
A. Presence of chlorophyll a and d
B. Presence of chlorophyll a and b
C. Presence of carotenoids only
D. Presence of phycobilins only
Show Answer & Explanation
Correct Answer: A
Red algae contain chlorophyll a and d, along with phycobilins, which give them their characteristic color.
Q5
Medium
Which group of algae is primarily known for being unicellular?
A. Green algae
B. Red algae
C. Brown algae
D. Diatoms
Show Answer & Explanation
Correct Answer: D
Diatoms are primarily unicellular and are known for their unique silica cell walls.
Q6
Medium
What is the main storage product of brown algae?
A. Starch
B. Laminarin
C. Glycogen
D. Cellulose
Show Answer & Explanation
Correct Answer: B
Brown algae primarily store energy in the form of laminarin, a polysaccharide.
Q7
Medium
Which of the following is NOT a reproductive structure in algae?
A. Sorus
B. Zoospore
C. Oogonium
D. Thallus
Show Answer & Explanation
Correct Answer: D
Thallus refers to the body structure of algae, not a reproductive structure.
Q8
Hard
What pigment is found in red algae that allows them to absorb blue light effectively?
A. Chlorophyll a
B. Phycocyanin
C. Phycoerythrin
D. Carotenoids
Show Answer & Explanation
Correct Answer: C
Phycoerythrin is the pigment in red algae that allows them to absorb blue light, aiding in photosynthesis at greater depths.
Q9
Hard
Euglenophyta contains characteristics of both plants and animals. What primarily differentiates them from true plants?
A. Presence of chloroplasts
B. Ability to move using flagella
C. Autotrophic nutrition
D. Cellulose cell walls
Show Answer & Explanation
Correct Answer: B
Euglenophyta can move using flagella, setting them apart from true plants which are generally stationary.
Q10
Hard
Which of the following algae are known for their high agar production?
A. Green algae
B. Brown algae
C. Red algae
D. Blue-green algae
Show Answer & Explanation
Correct Answer: C
Red algae are primarily known for high agar production, widely used in food and pharmaceutical industries.

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Plant Kingdom — Class 11 Biology Practice Questions Online

This page contains 2178 practice MCQs for the chapter Plant Kingdom in Class 11 Biology. The questions are organized by difficulty — 682 easy, 1084 medium, 412 hard — so you can choose the right level for your preparation.

Every question includes a detailed explanation to help you understand the concept, not just memorize answers. Take a timed quiz to simulate exam conditions, or practice at your own pace with no time limit. This chapter covers 5 topics, giving you comprehensive coverage of the entire chapter.