31. What diseases can we get in the large intestine?
[A] Diverticulitis
[B] Appendicitis
[C] Hemorrhoids
[D] All of the above
Show Answer
Correct Answer: D [All of the above]
Notes:
Diverticulitis, Appendicitis, and Hemorrhoids are the diseases we can get in the large intestine.
32. What of the following is not a reproduction-related problem?
[A] STDs
[B] Abortion
[C] Global warming
[D] Infertility
Show Answer
Correct Answer: C [Global warming]
Notes:
Global warming is an environmental-related problem. Whereas STDs, Abortion, and Infertility are reproduction-related problems.
33. Ehrlichiosis is a tick-borne bacterial infection, caused by __
[A] Mycobacterium tuberculosis
[B] Anaplasmataceae
[C] Sphaerophorus necrophorus
[D] Clostridium hemolyticum
Show Answer
Correct Answer: B [Anaplasmataceae]
Notes:
Ehrlichiosis is a tick-borne bacterial infection, caused by Anaplasmataceae.
34. Which of the following will be pure breeding for only one character?
[A] Hh Rr
[B] HH Rr
[C] HH RR
[D] hh rr
Show Answer
Correct Answer: B [HH Rr]
Notes:
Hh RR would breed correct for the H locus but since it is heterozygous for the R locus, the R character would not be correct.
35. Homozygosity and heterozygosity of an individual can be determined by __
[A] Back cross
[B] Self-fertilization
[C] Test cross
[D] All of the above
Show Answer
Correct Answer: C [Test cross]
Notes:
An experimental cross of an individual organism of dominant phenotype but unknown genotype and an organism with a homozygous recessive genotype is known as a test cross.
36. Transgenic plants have desirable traits like __
[A] harmful genes
[B] herbicide resistance
[C] lactose intolerance
[D] complementary genes
Show Answer
Correct Answer: B [herbicide resistance]
Notes:
Transgenic plants have desirable traits like herbicide resistance. The inherited ability of an individual plant to survive the application of a herbicide that would kill a general population of the same species is called herbicide resistance.
37. Heart attack occurs due to
____:
[A] Impairment of hearts working due to unknown reasons
[B] Bacterial attack on the heart
[C] Lack of supply of blood to the heart itself
[D] Stopping of heart beat
Show Answer
Correct Answer: C [Lack of supply of blood to the heart itself]
Notes:
A heart attack occurs when blood flow to a part of your heart is blocked for a long enough time that part of the heart muscle is damaged or dies. The medical term for this is myocardial infarction. Most heart attacks are caused by a blood clot that blocks one of the coronary arteries. The coronary arteries bring blood and oxygen to the heart. If the blood flow is blocked, the heart is starved of oxygen and heart cells die.
38. Which of the following statement is incorrect?
[A] Each sperm is a single cell
[B] Oviparous animal does not give birth to young ones
[C] External fertilisation takes place in frog
[D] Fertilisation is necessary even in asexual reproduction
Show Answer
Correct Answer: D [Fertilisation is necessary even in asexual reproduction]
Notes:
While fertilization is necessary for organisms that reproduce sexually, individuals that reproduce asexually?do so without the need for fertilization. These organisms produce genetically identical copies of themselves through?binary fission, budding, fragmentation, parthenogenesis, or other forms of asexual reproduction.
39. What combination of paternal chromosome results in a female?
[A] ZX
[B] XY
[C] XX
[D] YZ
Show Answer
Correct Answer: C [XX]
Notes:
Among the many things parents hand down to their children are 23 pairs of chromosomes-those thread-like structures in the nucleus of every cell containing the genetic instructions for every person. One of those pairs are the chromosomes that determine the biological sex of a child – girls have an XX pair and boys have an XY pair. Females always pass an X chromosome onto their offspring. If the father passes on an X chromosome, the baby will be genetically female, and if the father passes on a Y chromosome, the baby will be genetically male.
40. With which one of the following Jacobsons organ is related to?
[A] Vision
[B] Chewing
[C] Hearing
[D] Smelling
Show Answer
Correct Answer: D [Smelling]
Notes:
Jacobson’s organ, also called vomero-nasal organ, is a patch of sensory cells within the main nasal chamber that detects heavy moisture-borne odour particles. It is a “sense of smell” receptor that is actually not receptive to ordinary odours.
