1. Which of the following protects the body against infectious disease and foreign invaders?
[A] Leukocytes
[B] Red blood cells
[C] Endoplasmic reticulum (ER)
[D] Golgi apparatus
Show Answer
Correct Answer: A [Leukocytes]
Notes:
White blood cells (WBCs), also called leukocytes or leucocytes, are the cells of the immune system that are involved in protecting the body against both infectious disease and foreign invaders. All white blood cells are produced and derived from multipotent cells in the bone marrow known as hematopoietic stem cells.
2. In which among the following categories, Nepenthes khasiana or Indian Pitcher Plant can be placed?
[A] Saprophyte
[B] Xerophyte
[C] Insectivorous
[D] Halophyte
Show Answer
Correct Answer: C [Insectivorous]
Notes:
Nutrition is plants is classified into two main categories: autotrophic and heterotrophic. Heterotrophic plants are further classified into saprophytes, parasite and insectivores.
Saprophytes are those plants which grow and live on dead organic matter including animal and plant remains
Insectivorous plants are autotrophic but develop adaptations to trap insects in order to supplement the deficiency of Nitrogen in the soil. They feed on insects. They are generally found in nitrogen deficient habitats and hence to compensate the loss, they use insects as a source of nitrogen.
3. Least generative power is a feature of which among the following cells of Human Body?
[A] Brain
[B] Bones
[C] Skin
[D] Liver
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Correct Answer: A [Brain]
Notes:
The human brain is the central organ of the human nervous system, and with the spinal cord makes up the central nervous system. It is considered to have the Least generative power.
4. “Rinderpest” disease, which was recently eliminated was caused by which among the following?
[A] Bacteria
[B] Virus
[C] Fungi
[D] Nematode
Show Answer
Correct Answer: B [Virus]
Notes:
Rinderpest which is also called as cattle plague or steppe murrain was an infectious viral disease of cattle, domestic buffalo, and many other species of even-toed ungulates, including buffaloes. It was recently eliminated.
5. Which among the following correctly defines Hypoglycemia ?
[A] Lower than normal level of thyroxin secretion
[B] Lower than normal level of protein
[C] Lower than normal secretion of one or more of the eight hormones normally produced by the pituitary gland
[D] Lower than normal level of blood glucose
Show Answer
Correct Answer: D [Lower than normal level of blood glucose]
Notes:
Hypoglycemia is a condition in which your blood sugar which is also called as glucose is lower than normal in human body. Diabetes treatment and other conditions can cause hypoglycaemia.
6. Which part of the plant Raphanus sativus is edible?
[A] Fruit
[B] Leaves
[C] Roots
[D] All the above
Show Answer
Correct Answer: D [All the above]
Notes:
Raphanus sativus is Radish. The Edible parts are roots, but Radish leaves and seedpods which are fruits are also edible.
7. Which among the following have a ‘mixed heart’ ,that is the heart in which the oxygenated and the deoxygenated blood is mixed?
[A] Birds
[B] Fishes
[C] Reptiles
[D] Nematodes
Show Answer
Correct Answer: C [Reptiles]
Notes:
Reptiles and Amphibians have a mixed heart.
8. In which of the following class can we put Adrenaline?
[A] Fat
[B] Hormone
[C] Enzyme
[D] Protein
Show Answer
Correct Answer: B [Hormone]
Notes:
Adrenaline, also known as epinephrine, is a hormone, neurotransmitter, and medication. Adrenaline is normally produced by both the adrenal glands and certain neurons.
9. Which one of the following is secreted by Pancreas and regulates the amount of sugar in the body? (UPSC Prelims 1980).
[A] Renin
[B] Creatin
[C] Vitamin
[D] Insulin
Show Answer
Correct Answer: D [Insulin]
Notes:
Insulin and glucagon are hormones secreted by islet cells within the pancreas. They are both secreted in response to blood sugar levels, but in opposite fashion. Insulin is normally secreted by the beta cells of the pancreas. Glucagon raises blood glucose levels by stimulating the liver to metabolize glycogen into glucose molecules and to release glucose into the blood. Insulin is a hormone that regulates blood sugar levels.
10. Why man cannot digest cellulose whereas cows can do so? (UPSC Prelims 1992)
[A] Their gut contains certain bacteria capable of digesting cellulose
[B] They have a many-chambered stomach
[C] They have efficient grinding molars
[D] They produce enzyme cellulose which can digest cellulose
Show Answer
Correct Answer: A [Their gut contains certain bacteria capable of digesting cellulose]
Notes:
Unlike cows for example don’t have the necessary bacteria in their intestines that make the enzymes necessary to breakdown the 1-4 beta glucose bonds. So we cannot break down cellulose into its constituent glucose molecules as we do with starch.
