1. Deficiency of Vitamin D causes?
[A] Rickets
[B] Night blindness
[C] Goitre
[D] None of the above
Show Answer
Correct Answer: A [Rickets]
Notes:
Deficiency of Vitamin D can lead to a loss of bone density, which can result in osteoporosis and fractures (broken bones). In children the deficient of Vitamin D can cause rickets.
2. The acidic medium of gastric juice along with an enzyme Pepsin breaks the proteins down into smaller parts known as _____?
[A] Peptides
[B] Peptones
[C] Peptose
[D] Amino Acids
Show Answer
Correct Answer: B [Peptones]
Notes:
The acidic medium of gastric juice and the enzyme pepsin break down proteins into smaller parts known as peptones. Pepsin is the main enzyme involved in protein digestion. It breaks down proteins into smaller peptides and amino acids that can be easily absorbed in the small intestine.
The gastric juice contains hydrochloric acid, which helps maintain the pH in the range of 1.5 to 2.5. This pH range is very acidic and is necessary for optimum activity of pepsin. The hydrochloric acid converts inactive enzymes (zymogens) into active enzymes.
The gastric glands in the stomach secrete the enzyme pepsin. When pepsinogen is released into the stomach and mixed with gastric juice, it is converted into pepsin.
3. Chlorophyll absorbs which of the wavelength of the Sun light ?
[A] Green & Blue
[B] Green & Red
[C] Red & Blue
[D] Red & Yellow
Show Answer
Correct Answer: C [Red & Blue]
Notes:
Chlorophyll absorbs red and blue light but reflects green light.
4. Amino acids join together to make polypeptides. What polypeptides make by joining together?
[A] Carbohydrates
[B] proteins
[C] vitamins
[D] All the above
Show Answer
Correct Answer: B [proteins]
Notes:
Proteins are made up of chains of amino acids bound by bonds called peptide bond. There are some 22 different known amino acids which can compose proteins. There may be many more unknown to us.
5. Leishmaniasis is a disease caused by protozoan parasites that belong to the genus Leishmania and is transmitted by the bite of certain species of_________?
[A] Mosquito
[B] Sand fly
[C] Bee
[D] None of the above
Show Answer
Correct Answer: B [Sand fly]
Notes:
Leishmaniasis is a disease caused by protozoan parasites that belong to the genus Leishmania and is transmitted by the bite of certain species of Sandflies. The disease can present in three main ways: cutaneous, mucocutaneous, or visceral.
6. Maximum Proteins part of our food are digested in which part of our alimentary canal ?
[A] Oral cavity
[B] Small intestine
[C] Large intestine
[D] Stomach
Show Answer
Correct Answer: B [Small intestine]
Notes:
Maximum Proteins part of our food are digested in stomach and duodenum part of small intestine. Enzyme pepsin is secreted in the stomach and trypsin, chymotrypsin, and carboxypeptidase are secreted from the pancreas for digestion of protein.
7. The blood pressure is denoted as following?
[A] Systolic Pressure / Diastolic Pressure
[B] Diastolic Pressure / Systolic Pressure
[C] Venous Pressure / Systolic Pressure
[D] Systolic Pressure / Pulse Pressure
Show Answer
Correct Answer: A [Systolic Pressure / Diastolic Pressure]
Notes:
Blood Pressure is expressed in two numbers. The higher number is known as Systolic Pressure, or the amount of force (as measured in millimetres of mercury) that is exerted against the artery walls during a heartbeat (contraction). The lower number in the Diastolic pressure, which does the force exist while the heart is resting between beats.
8. Bubo bubo is the scientific name of which of the following species?
[A] Hen
[B] Peacock
[C] Eagle
[D] Owl
Show Answer
Correct Answer: D [Owl]
Notes:
Bubo bubo is the scientific name of owl. The Bubo bubo or the Eurasian eagle-owl is a species of eagle-owl that resides in much of Eurasia.
9. Bulbil takes part in which of the following processes in plants?
[A] Sexual reproduction
[B] Respiration
[C] Food storage
[D] Vegetative reproduction
Show Answer
Correct Answer: D [Vegetative reproduction]
Notes:
Bulbil, also called bulblet, in botany, is a tiny secondary bulb that forms in the angle between a leaf and stem or in place of flowers on certain plants for vegetative reproduction. Bulbils, called offsets when full-sized, fall or are removed and planted to produce new plants.
10. Which of the following is the best reason behind the fact that bats can fly in the dark?
[A] Bats have a better vision in the dark
[B] The light startles them
[C] Bats produce high pitched sounds ultrasonic
[D] None of the above
Show Answer
Correct Answer: C [Bats produce high pitched sounds ultrasonic]
Notes:
The sounds that bats make are so high pitched that humans cannot hear them. High pitched sounds like this are called ultrasound. So, bats make high pitched squeaks while they fly. The echoes travel back to the bat and it can then tell how far away the objects are.
Bats use echoes or reflected sounds to determine the surrounding situation and to locate their prey. Often we see the bats fly at night. They fly in the dark so quickly without hitting anything. This process is called echolocation.
