1. Which of the following statements is incorrect about the Lysosome?
[A] It is a membrane-bound organelle found in plant as well as animal cells
[B] It is also called the suicidal bag of the cell
[C] It helps in the synthesis of protein
[D] It acts as a dispatch station of protein products received from the endoplasmic reticulum (ER)
Show Answer
Correct Answer: D [It acts as a dispatch station of protein products received from the endoplasmic reticulum (ER)]
Notes:
Golgi apparatus acts as a dispatch station of protein products received from the endoplasmic reticulum (ER). Lysosomes are membrane-bound organelles. They are also called suicide bags because in case of disturbance of their cellular metabolism they digest their own cell by releasing own enzymes. Though lysosomes are not commonly-found in plant cells, but some plant cells do contain lysosomes.
2. Which among the following has the highest content of Vitamin E of any food that has not undergone prior preparation or vitamin fortification?
[A] Wheat germ oil
[B] Rice germ oil
[C] Oat bran oil
[D] Sunflower oil
Show Answer
Correct Answer: A [Wheat germ oil]
Notes:
Wheat germ oil is extracted from the germ of the wheat kernel, which makes up only 2.5% by weight of the kernel. It has the highest content of Vitamin E.
3. Calorie of Energy is equal to _________?
[A] .42 joule
[B] 4.2 joule
[C] 42 joule
[D] 0.042 Joule
Show Answer
Correct Answer: B [4.2 joule]
Notes:
The calorie is a unit of energy widely used in nutrition. The small calorie or gram calorie is the amount of heat energy needed to raise the temperature of one gram of water by one degree Celsius.
4. How many vertebrae does a human being have ?
[A] 33
[B] 36
[C] 29
[D] 19
Show Answer
Correct Answer: A [33]
Notes:
The vertebral column usually consists of 33 vertebrae: 24 presacral vertebrae (7 cervical, 12 thoracic, and 5 lumbar) followed by the sacrum (5 fused sacral vertebrae) and the coccyx (4 frequently fused coccygeal vertebrae).
5. The useful part of Zingiber officinale is ____?
[A] Roots
[B] Rhizome
[C] Leaves
[D] fruits
Show Answer
Correct Answer: B [Rhizome]
Notes:
The useful part of Zingiber officinale is rhizome. It is a flowering plant whose rhizome, ginger root or ginger, is widely used as a spice and also as a medicine. It is a herbaceous perennial plant.
6. Which among the following enzyme allows the cows to digest cellulose?
[A] beta-lactase
[B] alpha-amylase
[C] beta-amylase
[D] alpha-lactase
Show Answer
Correct Answer: C [ beta-amylase]
Notes:
Correct answer is beta-amylase. Regarding amylase there is an interesting fact that it has proved its role in Human evolution. The salivary amylase levels found in the human lineage are six to eight times higher in humans than in chimpanzees, which are mostly fruit eaters and ingest little starch relative to humans.
7. Which of the following two vegetables are in same Genus Solanum?
[A] Potato and Brinjal
[B] Potato and Cauliflower
[C] Brinjal and Chilli
[D] Tomato and Radish
Show Answer
Correct Answer: A [Potato and Brinjal]
Notes:
Potato and Brinjal have several common features and are thus included in the same genus Solanum. The scientific name of Potato is Solanum tuberosum and Brinjal is Solanum melongena.
8. How Green plants in the sea are useful for the respiration of fish? (UPSC Prelims 1979).
[A] They give out oxygen
[B] They give out carbon dioxide
[C] The give out oxygen and carbon dioxide simultaneously
[D] They take oxygen and give out carbon dioxide
Show Answer
Correct Answer: A [They give out oxygen]
Notes:
Oxygen is a natural element which no animal can live without. Fish and other aquatic animals depend on oxygen gas dissolved in water as much as people depend on oxygen gas in air. Many people are surprised to learn that fish and other aquatic organisms don’t use oxygen from water molecules (H2O). This is because the single oxygen molecule (O) is bound to the two hydrogen molecules (H2) and is not useable in this form. Instead, aquatic organisms depend on dissolved oxygen gas (O2), a colorless, tasteless and odorless substance that enters the water from plants and the atmosphere.
9. In which of the following diseases Sex chromosomes transmit? (UPSC Prelims 1985)
[A] Myopia
[B] Colour blindness
[C] Longsightedness
[D] Night blindness
Show Answer
Correct Answer: B [Colour blindness]
Notes:
It is sex-linked that genetic red-green color blindness affects males much more often than females, because the genes for the red and green color receptors are located on the X chromosome, of which males have only one and females have two.
10. Endoscopy, a technique used to explore the stomach or other inner parts of the body is based on the which of the following phenomenon? (UPSC Prelims 1999)
[A] Total internal reflection
[B] interference
[C] diffraction
[D] polarisation
Show Answer
Correct Answer: A [Total internal reflection]
Notes:
Endoscopy, a technique used to explore the stomach or other inner parts of the body is based on total internal reflection. The endoscopy procedure uses an endoscope to examine the interior of a hollow organ or cavity of the body. Unlike many other medical imaging techniques, endoscopes are inserted directly into the organ. There are many types of endoscopes.
