MCQ’S ON CHEMIOSMOTIC HYPOTHESIS
1. Proton concentration is highest in which part of the chloroplast?
(a) Stroma
(b) Intermembrane space
(c) Lumen of thylakoids
(d) Antennae complex
Answer: (c)
2. Cyclic photophosphorylation is associated with the production of
(a) ATP
(b) NADPH
(c) O2
(d) All of the above
Answer: (a)
3. During cellular respiration, chemiosmosis occurs in
(a) Chloroplast
(b) Mitochondria
(c) Peroxisome
(d) Nucleoplasm
Answer: (b)
4. Which of the following is necessary for chemiosmosis?
(a) Proton gradient
(b) Membrane
(c) Proton pump
(d) All of the above
Answer: (d)
5. Which of the following processes is responsible for generating a proton gradient across the thylakoid membrane?
(a) Proton carrier transport H+ from stroma to lumen
(b) Splitting of water on the inner side of the membrane
(c) NADP reductase enzyme present at the stroma side, removes proton by reducing NADP+
(d) All of the above
Answer: (d)
6. Proton concentration is highest in which part of the mitochondria?
(a) Matrix
(b) Inner membrane
(c) Outer membrane
(d) Intermembrane space
Answer: (d)
7. Which part of ATP synthase forms the transmembrane channel?
(a) CF0
(b) CF1
(c) Both
(d) None of the above
Answer: (a)
8. The ATP synthesised by ATP synthase present in the thylakoid membrane is released towards
(a) stroma
(b) lumen
(c) inner membrane
(d) outer membrane
Answer: (a)
9. ATP synthesis by ATP synthase is driven by the movement of
(a) protons
(b) NADPH
(c) electrons
(d) All of the above
Answer: (a)
10. Who proposed the chemiosmotic hypothesis of ATP synthesis?
(a) Francis Crick
(b) H G Khorana
(c) Peter Mitchell
(d) J D Watson
Answer: (c)
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MCQ’S ON FAUNA
1. This is the most important human activity that causes the extinction of wildlife
(a) destruction and alteration of natural habitats
(b) introducing alien species
(c) hunting valuable wildlife products
(d) wildlife pollution
Answer: (a)
2. In India, flamingos migrate in large numbers to nest in this region
(a) the Himalayas
(b) coastal areas
(c) Rann of Kachchh
(d) Thar
Answer: (c)
3. The Pink Headed duck falls under the category of
(a) Rare species
(b) Endemic species
(c) Extinct species
(d) Vulnerable species
Answer: (c)
4. This is an endangered species of the Manipur
(a) Asiatic Buffalo
(b) Blue Sheep
(c) Cattle
(d) Sangai (brow anter deer)
Answer: (d)
5. The Red Data Book gives data on
(a) endangered plants and animals
(b) red coloured fishes
(c) red coloured flowers
(d) lists plants and animals
Answer: (a)
6. Preservation of viable material of endangered species can be done by
(a) Herbarium
(b) Gene pool
(c) Gene library
(d) Gene Bank
Answer: (d)
7. This is the animal symbol of World Wildlife Fund
(a) Giant Panda
(b) Kangaroo
(c) Red Panda
(d) Tiger
Answer: (a)
8. The diversity of our flora and fauna is affected by the threat posed by
(a) increase in levels of pollution
(b) increasing insensitivity to our environment
(c) dearth of water
(d) global warming
Answer: (b)
9. This crisis will be produced first and foremost if half of the forest coverage of the earth is uncovered
(a) the remaining half of the forest maintains the imbalance
(b) there will be an energy crisis
(c) there will be a population increase and ecological imbalance
(d) few species will go extinct
Answer: (d)
10. India belongs to this category in the context of wildlife and natural vegetation
(a) a country lacking in biodiversity e cover
(b) the country with the largest forest cover
(c) the richest wildlife zone in the world
(d) one of the twelve Mega biodiversity countries of the world
Answer: (d)
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MCQ’S ON SPECIATION
1. What stops a new chromosome variant appearing as a unique mutation from increasing in frequency?
(a) It is because polyploidy is a rare process
(b) it will interbreed with majority form causing heterozygotes to be inferior
(c) allopatric speciation does not necessitate reinforcement
(d) all of these
Answer: (b)
2. This is the key to speciation of populations
(a) reproductive health
(b) reproductive isolation
(c) population growth
(d) extinction
Answer: (b)
3. This can cause a steeper cline
(a) Extensive migration
(b) Strong selection against heterozygotes
(c) Stabilizing selection throughout the region
(d) All of these
Answer: (b)
4. The reproductive isolating factor occurring when a sperm and an egg are incompatible is
(a) temporal isolation
(b) ecological isolation
(c) gametic isolation
(d) behavioural isolation
Answer: (c)
5. Species, the biological concept is applicable only to the breeding populations
(a) that are adequately large to constitute a viable reproductive group
(b) that are adequately uniform to be recognized by observation
(c) in experimental conditions
(d) in nature
Answer: (d)
6. Which of the following is included in the concept of genetic bottlenecks?
(a) a loss of genetic diversity in descendent populations
(b) sharing genetic material between two populations
(c) extensive gene flow
(d) increased ability to resist new diseases
Answer: (a)
7. This type of speciation enables production of hybrids between two species
(a) allopatric speciation
(b) parapatric speciation
(c) bottleneck
(d) sympatric
Answer: (b)
8. This is not a reproductive isolating mechanism
(a) ecological isolation
(b) individual isolation
(c) temporal isolation
(d) behavioural isolation
Answer: (b)
9. In this kind of speciation, evolution can be expected to be faster whilst the speciation between the speciating events
(a) Peripheral speciation
(b) Hybridization
(c) Sympatric speciation
(d) Both (b) and (c)
Answer: (a)
10. A new species emerges from this geographic range of its ancestor as per this theory of speciation
(a) Sympatric speciation
(b) Parapatric speciation
(c) Allopatric speciation
(d) None of these
Answer: (a)
