1. Rafflesia is the plant with largest flowers and found in many parts of the South East Asia. It is a ______?
[A] Mangrove Plant
[B] Ornamental Plant
[C] Parasitic Plant
[D] Carnivorous Plant
Show Answer
Correct Answer: C [Parasitic Plant]
Notes:
Rafflesia is a genus of parasitic flowering plants in the family Rafflesiaceae. It is the plant with largest flowers and found in many parts of the South East Asia.
2. With respect to the cultivation of Tea, the withering process is used to __?
[A] To stop the tea leaf oxidation at a desired level
[B] To remove excess water from leaves and allows slight oxidation
[C] To alter the flavour of the tea
[D] To stop browning of tea
Show Answer
Correct Answer: B [To remove excess water from leaves and allows slight oxidation]
Notes:
Withering is used to remove excess water from the leaves and allows a very slight amount of oxidation. The process is also important in promoting the breakdown of leaf proteins into free amino acids and increase the availability of freed caffeine, both which change the taste of the tea.
3. What is the number of mitochondria present in a bacterial cell?
[A] Zero
[B] One
[C] Two
[D] Four
Show Answer
Correct Answer: A [Zero]
Notes:
Bacterium contain no membrane bound nucleus and rarely contain membrane bound organelles. Simply, most don’t have any large organelles with their own membranes; this means no nucleus, no mitochondria and no chloroplast. Even if a bacteria wanted to have mitochondria , it is couldn’t.
4. Which of the following carries oxygen to various parts of human body?
[A] Red blood cells
[B] Nerves
[C] Plasma
[D] White blood cells
Show Answer
Correct Answer: A [Red blood cells]
Notes:
Hemoglobin is the protein inside red blood cells that carries oxygen. Red blood cells also remove carbon dioxide from your body, transporting it to the lungs for you to exhale.
5. Which of the following inferences can be drawn from the following statements?
A well balanced nutritious diet is essential for good athletes. This means
[A] Bad athletes are having under-nutritious food
[B] Well-balanced diet produces good athletes
[C] Athletes should take nutritious food
[D] None of the above
Show Answer
Correct Answer: C [Athletes should take nutritious food]
Notes:
Physical health is crucial for athletes and so is nutrition. We must take special care to get enough of the calories, vitamins. The amount of food you need depends on your age, height, weight, and sport or activity level. To keep their bodies performing optimally, endurance athletes should be familiar with these 10 important nutrients. The first seven essential supplements are the minerals calcium, iron, magnesium, potassium, selenium, sodium and zinc. Their benefits range from keeping bones strong to minimizing fatigue.
6. Match List I with List II and select the correct answer using the codes given below the lists.
|
List I
|
List II
|
|
A. Islets of Langerhans
|
1. Calcitonin
|
|
B. Pituitary gland
|
2. Epinephrine
|
|
C. Thyroid gland
|
3. Growth hormone
|
|
D. Adrenal gland
|
4. Insulin
|
Codes:
A B C D
[A] 4 3 2 1
[B] 4 3 1 2
[C] 3 4 1 2
[D] 3 2 4 1
Show Answer
Correct Answer: B [4 3 1 2]
Notes:
• The islets of Langerhans are a cluster of cells within the pancreas that are responsible for the production and release of hormones that regulate glucose levels.
• Growth hormone is also called somatotropin or human growth hormone, peptide hormone. It is secreted by the anterior lobe of the pituitary gland. It stimulates the growth of essentially all tissues of the body, including bone.
• Calcitonin is a hormone that is produced in humans by the parafollicular cells of the thyroid gland. Calcitonin is involved in helping to regulate levels of calcium and phosphate in the blood, opposing the action of parathyroid hormone.
• Hormones secreted by the adrenal medulla are Epinephrine. Most people know epinephrine by its other name—adrenaline. This hormone rapidly responds to stress by increasing your heart rate and rushing blood to the muscles and brain.
7. Which of the following defines the process of Metastasis?
[A] cells divide rapidly under the influence of drugs
[B] cancer cells spread through the blood or laymphatic system to other sites or organs
[C] the chromosomes in cell nuclei are attached to the spindle before moving to the anaphase poles
[D] cancer cells are successfully inhibited to divide any further
Show Answer
Correct Answer: B [cancer cells spread through the blood or laymphatic system to other sites or organs]
Notes:
Metastasis is a complex process that involves the spread of a tumor or cancer to distant parts of the body from its original site. The cancerous cells are sloughed from the tumours and reach distant sites through blood, and whenever they get lodged in the body, they start a new tumour there. This property called metastasis is the most feared property of malignant tumours.
8. Which vitamin deficiency leads to Scurvy?
[A] Vitamin B3
[B] Vitamin C
[C] Vitamin K
[D] Vitamin B9
Show Answer
Correct Answer: B [Vitamin C]
Notes:
Vitamin C deficiency leads to scurvy. Symptoms of scurvy include gum bleeding, loose teeth, bulge in eyes.
9. Which branch of biology is known for the study of cells?
[A] Cytology
[B] Bacteriology
[C] Bryology
[D] Mycology
Show Answer
Correct Answer: A [Cytology]
Notes:
The study of cell or cell biology is called cytology. The initial phase of cytology began with the English scientist Robert Hooke’s microscopic examination of cork in 1665. He observed dead cork cells and introduced the word “cell” to describe them.
10. Who is the father of Genetics?
[A] Gregor Mendel
[B] Thomas Hunt Morgan
[C] Francis Galton
[D] Krateuas
Show Answer
Correct Answer: A [Gregor Mendel]
Notes:
Gregor Mendel was a botanist, educator and Augustinian bishop who was the first to lay the mathematical foundations of the science of genetics, which came to be known as Mendelism.
