1. Which of the following bacteria forms an endosymbiotic nitrogen fixing association with roots of legumes that helps in Nitrogen Fixation?
[A] Clostridium
[B] Rhizobium
[C] Salmonella
[D] Staphylococcus
Show Answer
Correct Answer: B [Rhizobium]
Notes:
Rhizobium Found in roots of legumes, like Peas, grams, Pulses etc, where it fixes atmospheric nitrogen as ammonia, which is then converted into useful amino acid.
2. Herpetology is the branch of science that deals with the study of__?
[A] Fishes
[B] Insects
[C] Snakes
[D] Amphibians and Reptiles
Show Answer
Correct Answer: D [Amphibians and Reptiles]
Notes:
Herpetology is the branch of zoology which deals with the study of amphibians such as frogs, toads, salamanders, newts and the gymnophiona; and reptiles such as snakes, lizards, amphisbaenids, turtles, terrapins, tortoises, crocodilians and the tuataras.
3. Vitamin A, D & C are respectively called as ____________ ?
[A] Retinol, Ascorbic Acid, Calciferol
[B] Retinol, Calciferol, Ascorbic Acid
[C] Pyridoxal. Calciferol. Ascorbic Acid
[D] Ascorbic Acid, Pyridoxal. Calciferol
Show Answer
Correct Answer: B [Retinol, Calciferol, Ascorbic Acid]
Notes:
Vitamin A, D & C are respectively called as Retinol, Calciferol and Ascorbic Acid. Vitamin A is essential for good vision, a healthy immune system, and cell growth. Vitamin D is a fat-soluble vitamin whereas Vitamin C is a water-soluble vitamin which is found in many foods, particularly fruits and vegetables.
4. Which of the following Vitamin is required for Normal Blood Circulation ?
[A] Vitamin A
[B] Vitamin K
[C] Vitamin D
[D] Vitamin E
Show Answer
Correct Answer: B [Vitamin K]
Notes:
Vitamin K is required for Normal Blood Circulation. Vitamin K is a fat-soluble vitamin which plays a key role in helping the blood clot, preventing excessive bleeding.
5. Which of the following Vitamin is essential for the formation of collagen?
[A] Vitamin A
[B] Vitamin B
[C] Vitamin C
[D] Vitamin D
Show Answer
Correct Answer: C [Vitamin C]
Notes:
Vitamin C is essential for the formation of collagen. The process of collagen synthesis occurs mainly in the cells of fibroblasts which are specialized cells with the main function of synthesizing collagen and stroma.
6. 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.
7. Why do birds not experience respiratory issues while flying at high altitudes?
[A] Their lungs are larger relative to body size
[B] They fly inactively at high altitudes
[C] None of the above is correct
[D] Birds possess additional air sacs
Show Answer
Correct Answer: D [Birds possess additional air sacs]
Notes:
Birds have unique respiratory systems with extra air sacs that provide continuous airflow and efficient oxygen exchange, even at high altitudes where air is thinner. These adaptations help birds avoid respiratory trouble during flight.
8. Which among the following are found in all viruses?
[A] DNA and proteins
[B] Nucleic acid and capsid
[C] DNA and cell membrane
[D] RNA and cell wall
Show Answer
Correct Answer: B [ Nucleic acid and capsid]
Notes:
Viruses are made up of nucleic acid (either DNA or RNA; but not both) surrounded by a protein coat called a capsid. They do not contain a cell wall, proteins, or cell membrane
9. As compared to Photosynthesis, the Chemosynthesis involves CO2 fixation using energy derived from __:
[A] Oxidation of inorganic molecules
[B] Sunlight
[C] Ultraviolet radiation
[D] Infra Red radiation
Show Answer
Correct Answer: A [ Oxidation of inorganic molecules]
Notes:
Some organisms are able to convert inorganic material into organic compounds by a process called Chemosynthesis. This involves oxidation of inorganic molecules (e.g. hydrogen gas, hydrogen sulfide) or methane as a source of energy, rather than sunlight, as in photosynthesis.
10. 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.
