91. What is the name of the hormone produced by thymus gland?
[A] Thyroxine
[B] Auxins
[C] Cytokinins
[D] Thymosin
Show Answer
Correct Answer: D [Thymosin]
Notes:
Thymosins are small proteins present in many animal tissues. They are named thymosins because they were originally isolated from the thymus, but most are now known to be present in many other tissues.
92. Soap bubble attains spherical shape due to which of the following reasons?
[A] Surface tension
[B] Inertia
[C] Pressure
[D] Viscosity
Show Answer
Correct Answer: A [Surface tension]
Notes:
Bubbles are spherical because there is an attractive force called surface tension that pulls molecules of water into the tightest possible groupings. And the tightest possible grouping that any collection of particles can achieve is to pack together into a sphere.
93. Which among the following carries impure blood to human heart?
[A] Pulmonary vein
[B] Vena Cava
[C] Aorta
[D] Pulmonary arteries
Show Answer
Correct Answer: D [Pulmonary arteries]
Notes:
The pulmonary artery carries impure blood to the right and left lungs. The left half of the heart collects and pumps pure (oxygenated) blood from the lungs to all parts of the body.
94. 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.
95. Which among the following does not have a cell wall?
[A] Mycoplasma
[B] Paramecium
[C] Euglena
[D] Gonyaulax
Show Answer
Correct Answer: A [Mycoplasma]
Notes:
Mycoplasma are a mollicute genus of bacteria that lack a cell wall around their cell membranes. Mycoplasma species are the smallest bacterial cells yet discovered, can survive without oxygen, and come in various shapes.
96. Night Blindness is caused by deficiency of which of the following Vitamins?
[A] Vitamin C
[B] Vitamin K
[C] Vitamin A
[D] Vitamin B
Show Answer
Correct Answer: C [Vitamin A]
Notes:
Night blindness is caused by nearsightedness, cataracts, or vitamin A deficiency. Night blindness (nyctalopia) is the inability to see well at night or in poor light. Its causes include glaucoma medications and cataracts
97. Which among the following is used to treat Indigestion?
[A] Antiseptic
[B] Antibiotic
[C] Antacid
[D] Analgesic
Show Answer
Correct Answer: C [Antacid]
Notes:
Antacids neutralize stomach acid to cut down on heartburn, sour stomach, acid indigestion, and stomach upset. Some antacids also contain simethicone, an ingredient that helps your body get rid of gas.
98. Which problem of human body can be treated by the process of Dialysis?
[A] Kidney trouble
[B] Liver trouble
[C] Lung trouble
[D] Bronchitis
Show Answer
Correct Answer: A [Kidney trouble]
Notes:Dialysis is a treatment that is needed when our own kidneys can no longer take care of body’s needs. Dialysis allows people with kidney failure a chance to live. When kidney function decreases to a critical level or complications arise, a person may need to start dialysis. Dialysis keeps your body in balance by:
- Removing waste, salt and extra water to prevent them from building up in the body
- Keeping a safe level of certain chemicals in your blood, such as potassium, sodium and bicarbonate
- Helping to control blood pressure
99. Which of the following is the most common use of the reserprine derived from the plant ‘Serpentina’?
[A] Alleviate pain
[B] Alleviate high blood pressure
[C] Alleviate low blood pressure
[D] Cure rickets
Show Answer
Correct Answer: B [Alleviate high blood pressure]
Notes:
Reserpine drug is derived from the roots of certain species of the tropical plants. It is derived from the powdered whole root of the Indian shrub Rauwolfia serpentine. It can be used to treat snakebites, insomnia, hypertension (high blood pressure), and insanity.
100. Sri Lanka has recently suspended the USD 1.5 billion Light Rail project, funded by which country?
[A] India
[B] China
[C] Japan
[D] United States
Show Answer
Correct Answer: C [Japan]
Notes:
The President of Sri Lanka has ordered the termination of a USD 1.5 billion Light Rail Transit (LRT) project, funded by Japan.
The reason for the suspension is said to be the high cost of the project, which was the largest single foreign-funded infrastructure project in Sri Lanka. Japan International Cooperation Agency (JICA) lent 30 billion yen (USD 285 million) to finance the first phase of the project.
