1. Ripening of fruits is because of which among the following plant hormones?
[A] Auxin
[B] Ethylene
[C] Gibberellins
[D] Carins
Show Answer
Correct Answer: B [Ethylene]
Notes:
Ripening is a process in fruits that causes them to become more palatable. Most fruits produce a gaseous compound called ethylene that starts the ripening process. Ethylene Gas Can be Used to Regulate Fruit Ripening.
2. Who among the following is considered to be the father of antiseptic surgery?
[A] Dr. Lineus Pauling
[B] Dr. Joseph Lister
[C] Robert Koch
[D] Louis pasteur
Show Answer
Correct Answer: B [Dr. Joseph Lister]
Notes:
Dr. Joseph Lister was a British surgeon and a pioneer of the antiseptic surgery. His research into bacteriology and infection in wounds, raised his skillful operative technique, that was similar to his peers.
3. Which among the following is correct ?
[A] Caffeine which is a diuretic is a constituent of coffee but not found in tea
[B] Vitamin C which is also called ascorbic acid can be replaced with citric acid in our food
[C] Citric acid is used in Cola drinks
[D] All are wrong statements
Show Answer
Correct Answer: B [Vitamin C which is also called ascorbic acid can be replaced with citric acid in our food]
Notes:
Vitamin C which is also called ascorbic acid can be replaced with citric acid. Vitamin C is a water-soluble vitamin which is found in many foods, particularly fruits and vegetables. It is a potent antioxidant, and has a positive effects on skin health and immune function.
4. In context with the connective tissues, which among the following connect Bones to Bones?
[A] Ligaments
[B] Tendons
[C] Reticular fibers
[D] Raphe
Show Answer
Correct Answer: A [Ligaments]
Notes:
In context with the connective tissues, ligaments connect join Bones to Bones. It is also known with the name of articular ligament, articular larua, fibrous ligament, or true ligament.
5. The primary function of Phylloclade in many plants is __?
[A] Protection from herbivores
[B] Production of food
[C] Attracting insects for pollination
[D] None of the above
Show Answer
Correct Answer: B [ Production of food]
Notes:
In some plants such as Cactuses, the stem is flattened and green and carries out the function of the leaf. Such a stem, adapted for the manufacture of food is called phylloclade. The leaves here are reduced or modified into spines to lessen the transpiring surface. Phylloclades are adapted for life in dry and arid regions.
6. Which among the following acts as a resistance against disease in the body? (UPSC Prelims 1982)
[A] Vitamins
[B] Carbohydrates
[C] Red Corpuscles
[D] White Corpuscles
Show Answer
Correct Answer: D [White Corpuscles]
Notes:
White blood cells help you fight infection. When one gets sick, white blood cell count is higher than normal. This is because your body is releasing more of these cells to fight the infection.
7. Which one of the following is useful for biological control of pests? (UPSC Prelims 1991)
[A] Honey bees and locusts
[B] Scorpions and spiders
[C] Wasps and birds
[D] Parrots and kites
Show Answer
Correct Answer: B [Scorpions and spiders]
Notes:
Spiders, mites, scorpions, and several related groups are not insects, but belong to the arthropod class Arachnida. About 15 families of spiders are frequently encountered in crops, where they provide benefit as natural control agents.
8. At which of the following ages Rennin and lactase, disappear in the human body? (UPSC Prelims 1994)
[A] two
[B] three
[C] five
[D] eight
Show Answer
Correct Answer: A [two]
Notes:
By the age of two, the rennin and lactase enzymes start disappearing. However, these enzymes completely disappear by the age of eight in humans. After, this the stomach of person becomes mature enough to produce pepsin to digest the food.
9. A man whose blood group is not known meets with a serious accident and needs blood transfusion immediately. Which one of the blood groups mentioned below and readily available in the hospital will be safe for transfusion? (UPSC Prelims 2001)
[A] O, Rh-
[B] O, Rh+
[C] AB, Rh-
[D] AB, Rh+
Show Answer
Correct Answer: B [O, Rh+]
Notes:
There is no A and B antigen on RBC of “O– ”bloodgroup , So O, Rh– is known as universal blood donor.
10. Epiphytes are plants which depend on other plants for? (UPSC Prelims 2001)
[A] food
[B] mechanical support
[C] shade
[D] water
Show Answer
Correct Answer: B [mechanical support]
Notes:
They are an important source of food for many species. Typically, the older parts of a plant will have more epiphytes growing on them. Epiphytes differ from parasites in that they grow on other plants for physical support and do not necessarily affect the host negatively.
