31. Which of the following genera of fungi is not responsible for causing ringworms?
[A] Trichophyton
[B] Microsporum
[C] Epidermophyton
[D] Macrosporum
Show Answer
Correct Answer: D [Macrosporum]
Notes:
Ringworm or round red or silver type superficial fungal infections of the skin are caused by species of Trichophyton, Microsporum, and Epidermatophyton. There are dry scaly lesions on the skin, nails, and scalp that cause intense itching.
32. The alternate form of a gene is__
[A] Alternate type
[B] Recessive character
[C] Dominant character
[D] Allele
Show Answer
Correct Answer: D [Allele]
Notes:
The alternate form of a gene is Allele. An allele is a variant of a gene.
33. An animal, plant, or micro-organism whose DNA has been altered using genetic engineering techniques is called?
[A] Genetically Matured Organisms
[B] Genetically Mental Organs
[C] Genetically Modified Organisms
[D] Genetically Mutant Organism
Show Answer
Correct Answer: C [Genetically Modified Organisms]
Notes:
An animal, plant, or micro-organism whose DNA has been altered using genetic engineering techniques is called Genetically Modified Organisms.
34. Which of the following is divalent cations are usually used to make competent cells?
[A] Carbon
[B] Nitrogen
[C] Copper
[D] Calcium
Show Answer
Correct Answer: D [Calcium]
Notes:
Calcium is divalent cations that are usually used to make competent cells.
35. The plant from which cocoa and chocolate are obtained is a ___:
[A] Herb
[B] Shrub
[C] Small tree
[D] Very big tree
Show Answer
Correct Answer: C [Small tree]
Notes:
Chocolate production starts with harvesting cocoa in a forest. Cocoa comes from tropical evergreen Cocoa trees, such as Theobroma Cocoa which are small trees. These trees live in the understory of tropical forests and require other, taller trees to shelter them from wind and sun.
36. Veins seen in the leaves, serve the function of ____:
[A] Photosynthesis
[B] Transpiration
[C] Conduction
[D] Storage
Show Answer
Correct Answer: C [Conduction]
Notes:
The veins are the vascular tissue of the leaf and are located in the spongy layer of the mesophyll. The veins are made up of: Xylem: tubes that bring water and minerals from the roots into the leaf; and Phloem: tubes that usually move sap, with dissolved sucrose, produced by photosynthesis in the leaf, out of the leaf. Veins lend support to the leaf tissue, helping it keep its shape.
37. Bacteria, blue-green algae or cyanobacteria and mycoplasma are examples of organisms of which kingdom?
[A] Plantae
[B] Protista
[C] Monera
[D] Animalia
Show Answer
Correct Answer: C [Monera]
Notes:
Bacteria, blue-green algae or cyanobacteria and mycoplasma are examples of Monera kingdom. The Monera kingdom contains unicellular organisms with a prokaryotic cell organization (having no nuclear membrane), such as bacteria. They are single-celled organisms with no true nuclear membrane (prokaryotic organisms).
38. The harmful substances produced by the microbes are known as ____:
[A] Toxins
[B] Hormones
[C] Pollutants
[D] Antibiotics
Show Answer
Correct Answer: A [Toxins]
Notes:
Toxins are substances created by plants and animals that are poisonous to humans. Most toxins that cause problems in humans are released by microorganisms such as bacteria, viruses, fungi, rickettsiae or protozoa. For example, cholera is due to a bacterial toxin so also tetanus.
39. An example of hormone is _____:
[A] Cytosine
[B] Oxytocin
[C] Peprin
[D] Renin
Show Answer
Correct Answer: B [Oxytocin]
Notes:
Oxytocin is a hormone that is normally produced in the hypothalamus and stored in the posterior pituitary gland. It plays a role in social bonding, sexual reproduction in both sexes, and during and after childbirth. It’s released causes stretching of the cervix and uterus during labor and with stimulation of the nipples for breast feeding.
40. Water in plants is trans-ported by _____:
[A] Phloem
[B] Xylem
[C] Cambium
[D] Epidermis
Show Answer
Correct Answer: B [Xylem]
Notes:
Water is transported through the plant in Xylem vessels, these begin in the roots and end in the leaves of the plant. Water is transported through a combination of “Transpirational pull” and capillary action that produces root pressure.
