Free Kingdom Fungi MCQs with Answers

151. The only special kind of genetic recombination found in deuteromycetes is known as:

• A. Conjugation
• B. Parasexuality
• C. Budding
• D. Transduction

Explanation: Parasexuality is the correct answer because it describes a process in deuteromycetes where genetic recombination occurs without the typical sexual reproduction cycle. This process allows for genetic variation by exchange of genetic material through a series of mitotic events, rather than meiosis and fertilization. Conjugation is incorrect as it is a form of genetic exchange found in bacteria and some fungi but not specific to deuteromycetes. Budding is incorrect because it is a form of asexual reproduction that does not involve genetic recombination, and transduction is incorrect as it is related to gene transfer in bacteria, not fungi.

152. Which statement is not true about deuteromycetes?

• A. They are also called imperfect fungi
• B. Their asexual spores are called conidia
• C. It is a heterogeneous polyphyletic group
• D. They have both sexual and asexual reproduction

Explanation: The correct answer is Option D: They have both sexual and asexual reproduction. This statement is not true about deuteromycetes. Deuteromycetes, also known as 'imperfect fungi,' are defined by the absence of a known sexual stage in their life cycle, hence they reproduce asexually through spores called conidia. Option A is correct because 'imperfect fungi' is another name for deuteromycetes. Option B is correct as they reproduce asexually via conidia. Option C is correct because deuteromycetes are a heterogeneous polyphyletic group, meaning they do not form a single lineage but are grouped together based on the lack of sexual reproduction.

153. Characteristic that does not help fungi to live on land:

• A. Lack of flagellated cells
• B. Thick walled zygote
• C. Dispersal of spores by wind
• D. Cytoplasmic flow throughout the hyphae

Explanation: The correct answer is cytoplasmic flow throughout the hyphae. This feature is not directly related to survival on land; it is a general feature of fungi that aids in nutrient distribution within the mycelium. On the other hand, the lack of flagellated cells is beneficial as it reduces dependence on water for reproduction. The thick-walled zygote provides protection against desiccation, and spore dispersal by wind is crucial for colonizing new terrestrial environments.

154. Fungi can tolerate temperature:

• A. Below 5°C
• B. Above 50°C
• C. 5−50°C
• D. Both a and b

Explanation: Fungi are incredibly adaptable organisms that can survive in a broad range of temperatures. While most fungi thrive between 5°C and 50°C, some species are capable of surviving in extreme conditions below 5°C and above 50°C. These temperature extremes are not suitable for growth for all fungi, but some specialized fungi have adapted to these conditions. Therefore, the correct answer is 'Both a and b'. Options A, B, and C are incorrect as they only consider parts of the temperature spectrum where fungi can survive, rather than accounting for the full range of their adaptability.

155. Which is not an ecological role of fungi?

• A. Decomposition
• B. Bioremediation
• C. Bioindicator of pollution
• D. Mycorrhizal association

Explanation: The correct answer is Mycorrhizal association. This is a specific mutualistic relationship between fungi and plant roots, where both benefit, but it is not an ecological role of fungi. In contrast, Decomposition is a crucial ecological role of fungi as they break down dead organic matter. Bioremediation involves using fungi to clean up environmental pollutants, and as such, it's an ecological function. Bioindicator of pollution refers to fungi's ability to signal the presence of environmental pollutants, serving as ecological indicators.

156. Which of the following is not eatable?

• A. Mushrooms
• B. Morchella
• C. Amanita
• D. Aspergillus

Explanation: The correct answer is Amanita. Many Amanita species, such as the Amanita phalloides (death cap), are highly toxic and can be fatal if ingested, making them inedible. In contrast, mushrooms like those from the Agaricus genus are commonly consumed as food. Morchella, or morels, are highly sought after for culinary purposes. Aspergillus is not eaten directly but is important in food production and fermentation.

157. Tuberous underground fruiting bodies of fungi found with the help of trained dogs;

• A. Morels
• B. Truffles
• C. Mushrooms
• D. All these

Explanation: Truffles are a type of tuberous fungi that grow underground. They are highly valued for their unique aroma and are often located with the help of trained dogs or pigs due to their subterranean growth. Other fungi like morels and mushrooms grow above ground and do not require trained animals for collection. Therefore, the correct answer is truffles.

158. One known as "death angel":

• A. Amanita
• B. Morchella
• C. Aspergillus
• D. Agaricus

Explanation: The correct answer is Amanita. The term 'death angel' commonly refers to highly toxic mushrooms in the Amanita genus, such as Amanita phalloides, which are known for their lethal effects if ingested. On the other hand, Morchella refers to morels, which are edible and prized in culinary contexts. Aspergillus is a genus of molds, some of which can cause health issues but are not referred to as 'death angel'. Lastly, Agaricus includes many edible species and lacks the deadly reputation associated with the term 'death angel'.

159. Poisonous mushroom whose gills glow in dark:

• A. Jack-O' Lantern Mushroom
• B. Amanita
• C. Aspergillus
• D. Agaricus

Explanation: The correct answer is the Jack-O' Lantern Mushroom. This species is known for its bioluminescent properties, where the gills can emit a faint greenish glow in the dark, a phenomenon known as foxfire. This glow is due to a chemical reaction involving luciferase enzymes. While 'Amanita' includes many poisonous species, they do not exhibit bioluminescence. 'Aspergillus' is a mold, not a mushroom, and does not glow. 'Agaricus' includes edible mushrooms such as the common button mushroom, which also do not glow in the dark.

160. Economic gains due to fungi is:

• A. Causes damage to stored cut lumber
• B. Responsible for Histoplasmosis
• C. Used in genetic/molecular biological research
• D. Starvation to death of many people

Explanation: The correct answer is that fungi are used in genetic and molecular biological research. Fungi like yeast are model organisms in scientific research, offering economic benefits through advancements in biotechnology, pharmaceuticals, and genetic engineering. The other options describe negative impacts or diseases associated with fungi, which do not represent economic gains.