Free Kingdom Fungi MCQs with Answers

121. Environment considered best for the growth of fungi:

• A. Dry
• B. Moist
• C. Very hot
• D. Very cold

Explanation: Fungi thrive in moist environments because moisture facilitates the absorption of nutrients through their cell walls, and provides the ideal conditions for their reproductive processes. In contrast, dry conditions lack the necessary moisture, very hot environments can be detrimental due to high temperatures affecting cellular function, and very cold conditions can significantly slow down or stop fungal metabolism.

122. Fungi can survive in dry conditions in which the following stage:

• A. Asexual reproduction
• B. Sexual reproduction
• C. Resting stage
• D. Active stage

Explanation: The correct answer is the 'Resting stage.' During this stage, fungi often produce spores or other dormant structures that are adapted to survive in dry or otherwise unfavorable conditions by reducing metabolic activity until conditions improve. In contrast, the 'Asexual reproduction' and 'Sexual reproduction' stages are more about propagation rather than survival in harsh conditions. The 'Active stage' requires moisture and other favorable conditions for growth and metabolism, making it unsuitable for dry environments.

123. Fungi can grow under all of the following conditions except

• A. pH from 2 to 9
• B. Wide temperature range
• C. Without organic matter
• D. High osmotic pressure

Explanation: Fungi are heterotrophic organisms that require organic matter to derive nutrients and energy, making it impossible for them to grow without it. This is why the correct answer is Option C: Without organic matter. Option A: pH from 2 to 9 is incorrect because fungi can grow in a wide range of pH levels. Option B: Wide temperature range is incorrect because fungi can adapt to various temperature conditions. Option D: High osmotic pressure is incorrect because many fungi can tolerate and even thrive in environments with high osmotic pressure.

124. Food reserve material in fungi is mainly;

• A. Starch
• B. Oil and glycogen
• C. Glucose
• D. Fat

Explanation: Fungi store energy primarily in the form of oils and glycogen. This differs from plants, which use starch as their main storage carbohydrate. Glycogen serves as a form of energy storage in fungi akin to its role in animals. Starch and glucose are not significant storage forms in fungi, with starch being common in plants and glucose being more of an immediate energy source. While fats can be a storage form, they are not as prominent as oils and glycogen in fungi.

125. Which one of the following type of asexual reproduction is not found in fungi?

• A. Budding
• B. Fragmentation
• C. Binary fission
• D. Spores

Explanation: The correct answer is binary fission. This method of asexual reproduction involves the division of a single organism into two parts, each of which grows into a new organism, and is primarily found in prokaryotic organisms like bacteria, not fungi. In contrast, fungi commonly reproduce asexually through budding, fragmentation, and spore formation, which involve different mechanisms suited to their eukaryotic nature and complex life cycles.

126. The common means of reproduction in fungi:

• A. Spores
• B. Budding
• C. Conidia
• D. All these

Explanation: Fungi primarily reproduce through the production and release of spores, which can be spread by wind, water, or other organisms. This is the most common and efficient way for fungi to propagate and survive in various environments. While budding and conidia production are methods of reproduction, they are more specific to certain types of fungi and are not as universally prevalent as spore formation. Therefore, the correct answer is Option A: Spores.

127. Non-motile asexual spores cut off in chains or clusters at the end of modified hyphae:

• A. Spore
• B. Conidia
• C. Bud
• D. Ascospores

Explanation: The correct answer is Conidia. Conidia are a type of non-motile asexual spore that fungi produce at the end of specialized hyphae called conidiophores. They are often formed in chains or clusters, which aligns with the description in the question. Spore is a generic term that doesn't specify the formation process. Bud refers to a different asexual reproduction method involving outgrowth from the parent. Ascospores are sexual spores, not asexual, and are formed inside asci, making them incorrect for this question.

128. Which structure is produced inside sporangium after meiosis in fungi?

• A. Spores
• B. Conidia
• C. Basidiospore
• D. Ascospore

Explanation: The correct answer is spores, as they are the reproductive structures produced inside sporangia following meiosis in many fungi, particularly in the Zygomycota and some other groups. The other options are incorrect because conidia are asexual spores produced externally, basidiospores are produced on basidia, and ascospores are produced inside asci, not sporangia.

129. Which of the following cells/structures are associated with asexual reproduction in fungi?

• A. Ascospores
• B. Conidia
• C. Zygospores
• D. Basidiospores

Explanation: The correct answer is Conidia. Conidia are asexually produced spores that are formed without the fusion of gametes, commonly observed in fungi such as ascomycetes. They allow for rapid colonization and growth under favorable conditions. In contrast, Ascospores, Zygospores, and Basidiospores are all associated with sexual reproduction processes in fungi. Ascospores are formed within asci in ascomycetes, Zygospores result from the fusion of gametes in zygomycetes, and Basidiospores are borne on basidia in basidiomycetes.

130. One of the following reproduces by budding:

• A. Smut fungi
• B. Yeast
• C. Mushrooms
• D. Puccinia

Explanation: The correct answer is Yeast. Yeast is a unicellular fungus that reproduces asexually by a process called budding, where a small new cell develops from a parent cell and eventually detaches. In contrast, Smut fungi, Mushrooms, and Puccinia reproduce primarily through the production of various types of spores, which is a different method of reproduction compared to budding.