1. Which among the following organs open in small intestine through Pylorus?
[A] Stomach
[B] Liver
[C] Pancreas
[D] All the above
Show Answer
Correct Answer: A [Stomach]
Notes:
The pylorus is the furthest part of the stomach that connects to the duodenum. It is divided into two parts, the antrum and the pyloric canal. The antrum connects to the body of the stomach, and the pyloric canal connects to the duodenum.
2. Which among the following is a main structural axes of a vascular plant?
[A] Thallus
[B] Leaves
[C] Stem
[D] Flower
Show Answer
Correct Answer: C [Stem]
Notes:
Stem is a main structural axes of a vascular plant. The stem transports water, minerals, and food to other parts of the plant; it may also store food, and green stems themselves produce food.
3. Which among the following makes the Cornea Transplantation easy and used more widely ?
[A] Cornea are easily available
[B] Cornea does not link up with blood vessels
[C] both of the above reasons
[D] none of the above
Show Answer
Correct Answer: B [Cornea does not link up with blood vessels]
Notes:
A cornea transplant also called as keratoplasty is a surgical procedure to replace part of your cornea with corneal tissue from a donor. Cornea does not link up with blood vessels, this makes the Cornea Transplantation easy and used more widely.
4. Consider the following statements:
- Color blindness is more common in men.
- Color blindness is an X-linked recessive trait.
- If both the X chromosomes are defective, a woman may have color blindness.
Which of the above statements are correct?
[A] Only 1
[B] 1, 2 and 3
[C] 2 and 3
[D] Only 1 and 2
Show Answer
Correct Answer: B [1, 2 and 3]
Notes:
Color blindness is more prevalent in men as it is an X-linked recessive disorder. Men, having only one X chromosome, are more susceptible if it is defective. Women, with two X chromosomes, become color blind only if both carry the defective gene. All three statements accurately describe the inheritance and prevalence of color blindness.
5. A treatment with which among the following plant hormones would prevent water loss from the plant leaves, by reducing transpiration, in times of low water availability?
[A] Ethylene
[B] Abscisic Acid
[C] Gibberelic Acid
[D] Auxin
Show Answer
Correct Answer: B [Abscisic Acid]
Notes:
A treatment with abscisic acid would prevent water loss from the plant leaves, by reducing transpiration, in times of low water availability.
6. Malaria can be caused by:
[A] all anopheles mosquitoes
[B] all culex mosquitoes
[C] only males Culex mosquitoes
[D] only female anopheles mosquitoes
Show Answer
Correct Answer: D [ only female anopheles mosquitoes]
Notes:
The Plasmodium parasite that causes malaria is neither a virus nor a bacterium – it is a single-celled parasite that multiplies in red blood cells of humans as well as in the mosquito intestine. When the female mosquito feeds on an infected person, male and female forms of the parasite are ingested from human blood.
7. Which of the following glands is responsible for production of melatonin and to regulate reproductive hormones?
[A] Pineal gland
[B] Pituitary Gland
[C] Hypothalamus
[D] Adrenal Glands
Show Answer
Correct Answer: A [ Pineal gland]
Notes:
The primary function of the Pineal gland is production of melatonin, which helps maintain circadian rhythm and regulate reproductive hormones.
8. Which of the following is the lowest taxonomic division shared by both man and frog?
[A] Order
[B] Class
[C] Phylum
[D] Family
Show Answer
Correct Answer: C [Phylum]
Notes:
In the kingdom of animals, the phylum Chordata includes the classes of Pisces, Amphibia, Reptilia, Aves and Mammalia. These classes have at some stage in their lives shown common characteristics. So, man and frog belong to the same Phylum in the taxonomical level.
9. Which of the following is most inclusive category of classification among others?
[A] Order
[B] Class
[C] Phylum
[D] Family
Show Answer
Correct Answer: C [ Phylum ]
Notes:
The higher the classification category, the more inclusive it is. Here phylum is highest so is most inclusive.
10. Which of the following is not a feature of organisms in the class Mammalia ?
[A] milk producing mammary glands
[B] cells with a membrane-bounded nucleus
[C] dorsal hollow nerve chord
[D] chitin in the cell membrane
Show Answer
Correct Answer: D [ chitin in the cell membrane ]
Notes:
Organisms in the class Mammalia all have milk producing mammary glands; cells with a membrane-bounded nucleus and a dorsal hollow nerve cord. Chitin in Cell Walls is the feature of Kingdom fungi.
