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. Lac is the scarlet resinous secretion from ________?
[A] Herbs
[B] Trees
[C] Bark
[D] insects
Show Answer
Correct Answer: D [insects]
Notes:
Lac is the scarlet resinous secretion from insects. It is secreted by a number of a number of species of lac insects, of which the most commonly cultivated is Kerria lacca. The farmer gets a stick that contains eggs ready to hatch and ties it to the tree to be infested.
3. Human Papilloma Virus is related to which of the following diseases?
[A] Prostate Cancer
[B] Cervical Cancer
[C] Lymphatic Filariasis
[D] Leukemia
Show Answer
Correct Answer: B [Cervical Cancer]
Notes:
Human papilloma virus (HPV) is a viral infection that’s passed between people through skin-to-skin contact. There are over 100 varieties of HPV. Human Papilloma Virus is 0related to Cervical cancer.
4. Which among the following animals is closest to corals in evolutionary terms?
- Sea Cow
- Sea Horse
- Sea Lion
- Sea Anemone
Select the correct answer using the codes given below:
[A] Only 1
[B] Only 2
[C] Only 3
[D] Only 4
Show Answer
Correct Answer: D [Only 4]
Notes:
Corals and sea anemones both belong to Phylum Cnidaria, sharing similar evolutionary lineages as simple, radially symmetrical, aquatic invertebrates. Sea cow (mammal), sea horse (fish), and sea lion (mammal) are distantly related and do not share this close evolutionary relationship with corals. Hence, option 4 is correct.
5. Which among the following will be the consequence of destruction of all beta cells in the pancreas?
[A] Glucagon secretion will stop and blood glucose levels will increase
[B] Glucagon secretion will stop and blood glucose levels will decrease
[C] Glucagon secretion will stop and digestive enzymes will be secreted
[D] Insulin secretion will stop and blood glucose levels will increase
Show Answer
Correct Answer: D [ Insulin secretion will stop and blood glucose levels will increase]
Notes:
Beta cells secrete insulin. Destruction of beta cells in the pancreas will halt the production of insulin. Therefore, eliminate answer choices (A), (B) and (C). This will lead to an increase in blood glucose levels.
6. Who among the following is the Father of Mutation theory of evolution?
[A] Alec Jeffery
[B] T.H. Morgan
[C] Bateson
[D] Hugo de Vries
Show Answer
Correct Answer: D [Hugo de Vries]
Notes:
Alec Jeffery is known as the father of Finger Printing Technique. H. Morgan is known as the Father of Experimental Genetics. Bateson is known as the Father of modern Genetics. Hugo de Vries Father of Mutation theory of evolution.
7. Typhoid fever is caused by which of the following?
[A] Allergy
[B] Fungus
[C] Bacteria
[D] Virus
Show Answer
Correct Answer: C [Bacteria]
Notes:
Typhoid fever is a systemic infection caused by bacteria Salmonella typhi, usually through ingestion of contaminated food or water. The acute illness is characterized by prolonged fever, headache, nausea, loss of appetite, and constipation or sometimes diarrhoea.
8. ‘Pace-maker’ is associated with which of the following body organs?
[A] Liver
[B] Brain
[C] Heart
[D] Lungs
Show Answer
Correct Answer: C [Heart]
Notes:
A pacemaker is a small device that’s placed in the chest or abdomen to help control abnormal heart rhythms. This device uses electrical pulses to prompt the heart to beat at a normal rate.
9. Which of the following is the later (Second) formed primary xylem elements?
[A] Xylem fibres
[B] Metaxylem
[C] Xylem parenchyma
[D] Protoxylem
Show Answer
Correct Answer: B [Metaxylem]
Notes:
Metaxylem is the part of the primary xylem that differentiates after the protoxylem and that is distinguished typically by broader tracheids and vessels with pitted or reticulate walls.
10. Which of the following is the main constituent of the Gobar gas? (UPSC Prelims 1979).
[A] Carbon dioxide
[B] Methane
[C] Ethylene
[D] Carbon monoxide
Show Answer
Correct Answer: B [Methane]
Notes:
Biogas or Gobar gas is produced by the breakdown of organic matter in the absence of oxygen. It can be produced from raw materials such as agricultural waste, manure, municipal waste, plant material, sewage, green waste or food waste. It is a renewable energy source. It comprises primarily methane (CH4) and carbon dioxide (CO2) and may have small amounts of hydrogen sulphide (H2S), moisture and siloxanes. It is produced by anaerobic digestion.
