11. Who is the father of Modern Botany?
[A] Carl Linnaeus
[B] Theophrastus
[C] Robert Hooke
[D] Krateuas
Show Answer
Correct Answer: A [Carl Linnaeus]
Notes:
Carl Linnaeus is known as the father of modern botany. Linnaeus first formulated the principles, known as binomial nomenclature, to create a uniform system for defining and naming natural species and species of organisms.
12. How do small molecules pass through the outer membrane of mitochondria?
[A] Carrier protein
[B] Channels
[C] Porins
[D] ATP pump
Show Answer
Correct Answer: C [Porins]
Notes:
The outer membrane is a relatively simple phospholipid bilayer made up of protein structures called porins. This makes it permeable to molecules of about 10 kilodaltons or less.
13. Which of the following can affect proteins and nucleic acids, but not viruses?
[A] Denaturation
[B] Enzyme treatment
[C] Pressure
[D] All of these
Show Answer
Correct Answer: D [All of these]
Notes:
Because it affects proteins upon denaturation, this nuclease enzymes affect nucleic acids and the pressure will affect the structure but not the virus.
14. Which is the last stage of gametophytic generation?
[A] Gametes
[B] Zygote
[C] Spore mother cells
[D] Spores
Show Answer
Correct Answer: A [Gametes]
Notes:
Gametes are the last stage of gametophytic generation. Gametes can be described as the sex cells of plants.
15. What is the most important function of the leaves?
[A] Photosynthesis
[B] Transpiration
[C] Guttation
[D] Storage
Show Answer
Correct Answer: A [Photosynthesis]
Notes:
Photosynthesis is the major function performed by leaves, through which carbon dioxide, water and sunlight are converted into glucose and energy.
16. Guava leaves come under the category of which of the following leaves?
[A] Simple Leaf
[B] Compound Leaf
[C] Both 1 and 2
[D] Neither 1 nor 2
Show Answer
Correct Answer: A [Simple Leaf]
Notes:
When a single lamina is attached to the main stem by a petiole, the leaf is said to be simple, as in guava leaves.
17. In which of the following colour, rate of photosynthesis is minimum?
[A] Red
[B] Blue
[C] Green
[D] Yellow
Show Answer
Correct Answer: D [Yellow]
Notes:
The rate of photosynthesis is minimum in yellow colour and maximum in red colour. This happens because in the absorption spectrum, the red and blue colour gets absorbed and the majority of green light gets reflected.
18. What is the function of chlorophyll?
[A] Emits green light
[B] Stores starch in leaves
[C] Trap Light energy
[D] Attract water
Show Answer
Correct Answer: C [Trap Light energy]
Notes:
Chlorophyll pigment in the green plant traps sunlight. The trapped energy is light energy which is further changed into chemical energy during the process of photosynthesis.
19. Fusion of female germ nucleus with male germ nucleus is called__?
[A] Adoption
[B] Excretion
[C] Fertilization
[D] Regeneration
Show Answer
Correct Answer: C [Fertilization]
Notes:
Fusion of female germ nucleus with male germ nucleus is called Fertilization.
20. What causes the characteristic stem-pitting symptoms in the disease?
[A] Citrus exocortis
[B] Citrus tristeza
[C] Citrus greening
[D] Citrus canker
Show Answer
Correct Answer: B [Citrus tristeza]
Notes:
Stem-pitting is caused by a strain of the Citrus Tristeza virus. This results in delayed bud break, poor growth in spring, stunted growth of infected plants, and a drop in yield.
