1. How many pairs of ribs are there in a human body?
[A] 10 pairs
[B] 12 pairs
[C] 14 pairs
[D] 16 pairs
Show Answer
Correct Answer: B [12 pairs]
Notes:
There are total 24 ribs (12 pairs), out of which 14 (7 pairs) are true ribs
2. Beriberi is a result of deficiency of which of the following?
[A] Riboflavin
[B] Thaimine
[C] Pyridoxine
[D] Cobalamine
Show Answer
Correct Answer: B [Thaimine]
Notes:
Vitamine B (Thiamine) deficiency produces beriberi, Wernicke-Korsakoff syndrome, and optic neuropathy.
Beriberi is a neurological and cardiovascular disease. The three major forms of the disorder are dry beriberi, wet beriberi, and infantile beriberi. Dry beriberi is characterized principally by muscular dysfunctions, while Wet beriberi is associated with mental confusion, muscular atrophy, edema. Infantile beriberi occurs in infants breast-fed by thiamin-deficient mothers.
3. With which of the following animals Galton’s whistle is most commonly associated?
[A] Horses
[B] Dogs
[C] whales
[D] Shark
Show Answer
Correct Answer: B [Dogs]
Notes:
Human can listen only the frequencies below 20 kHz. However animals like dogs, cats, dolphins, bats, and mice can listen above this limit. This principle was used by Galton who produced the ultrasonic waves by blowing a whistle. For human these whistle appears silent, while dogs and cats can listen it. It is used in training of dogs and cats
4. Which among the following is NOT a true bast fiber?
[A] Jute
[B] Hemp
[C] Flax
[D] Cotton
Show Answer
Correct Answer: D [Cotton]
Notes:
Please note that Bast Fibers are obtained from Phloem
5. The major difference between cartilage and bone is that:
[A] While Bone is a part of skeletal system, cartilage is a part of some other system
[B] While bone is made of collagen and calcium salts, cartilage is made of only collagen
[C] While bones have blood vessels, Cartilage have no blood vessels
[D] All of the above statements are correct
Show Answer
Correct Answer: C [ While bones have blood vessels, Cartilage have no blood vessels]
Notes:
Bones have blood vessels, but cartilage does not. Bones have a network of blood vessels that deliver oxygen and nutrients to the bone marrow. Cartilage is avascular, meaning it doesn’t have blood vessels. Instead, cartilage relies on diffusion to get nutrients from the surrounding environment. Because of this, cartilage heals more slowly than bone.
Cartilage is made up of chondrocyte cells that produce a matrix of collagen, proteoglycan, and elastin fibers. Cartilage is found in the joints, rib cage, ear, nose, throat, and between vertebral disks.
6. With reference to cellular organization, consider the following:
- Fungi
- Bacteria
- Algae
- Protozoa
Which of the above possess eukaryotic cells?
[A] Only 3 and 4
[B] Only 1 and 2
[C] 1, 2, 3 and 4
[D] Only 1, 3 and 4
Show Answer
Correct Answer: D [Only 1, 3 and 4]
Notes:
Eukaryotic cells feature a true nucleus and membrane-bound organelles. Fungi, algae, and protozoa are all eukaryotic organisms. In contrast, bacteria are prokaryotic, lacking a true nucleus and such organelles. Therefore, only Fungi, Algae, and Protozoa (1, 3 and 4) possess eukaryotic cells, while bacteria do not.
7. Which of the following is responsible for giving colour to human skin?
[A] Haemoglobin
[B] Melanin
[C] Luciferin
[D] Flavonoids
Show Answer
Correct Answer: B [Melanin]
Notes:
Melanin is a pigment that gives human skin, hair, and eyes their color. Dark-skinned people have more melanin in their skin than light-skinned people have. Melanin is produced by cells called melanocytes.
8. For developing in bred lines in farm animals, following factors are taken into consideration:
- The crossbreds should be of outstanding type.
- They should not carry any detrimental genes.
- Progeney tested animals.
- Herd size should be large.
Of the statements given above, which one of the following combinations of factors is most essential?
[A] 1 and 3
[B] 2 and 3
[C] 1 and 4
[D] 2 and 4
Show Answer
Correct Answer: D [2 and 4]
Notes:
Inbreeding results in homozygosity, which can increase the chances of offspring being affected by deleterious or recessive traits. This usually leads to at least temporarily decreased biological fitness of a population which is its ability to survive and reproduce. So for inbreeding they should not carry any detrimental genes and it is effective only if the herd is large.
9. Which among the following is not a fat soluble vitamin?
[A] Vitamin A
[B] Vitamin B
[C] Vitamin K
[D] Vitamin D
Show Answer
Correct Answer: B [Vitamin B]
Notes:
Vitamins are classified into two broad categories, water soluble (vitamins B complex and C) and fat soluble (vitamins A,D,E and K).
Extra info: Excess intake of fat soluble vitamins leads to toxicity and poses greater risk.
10. To which of the following kingdoms does the yeast belong to?
[A] Bacteria
[B] Virus
[C] Fungus
[D] None of the above.
Show Answer
Correct Answer: C [Fungus]
Notes:
Yeast is an unicellular eukaryotic micro organism belonging to the family of fungus.
