1. Amflora is a genetically modified ______?
[A] Rose
[B] Potato
[C] Lotus
[D] Tomato
Show Answer
Correct Answer: B [Potato]
Notes:
Amflora which is also known as EH92-527-1 is a genetically modified potato cultivar developed by BASF Plant Science. It is developed to produce a specific natural starch (amylopectin) needed for industrial applications.
2. Out of Diphtheria, Whooping cough, Typhoid , Diarrhea & Malaria which is not caused by bacteria?
[A] Whooping Cough
[B] Typhoid
[C] Malaria
[D] None of the above
Show Answer
Correct Answer: C [Malaria]
Notes:
Malaria (It is a disease caused by Protozoa Plasmodium family)
3. 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.
4. Which of the following organism grows on Common Bread?
[A] Bacterium
[B] Yeast
[C] Mucor
[D] Virus
Show Answer
Correct Answer: C [Mucor]
Notes:
Mucor is a microbial genus of approximately 40 species of moulds commonly found in soil, digestive systems, plant surfaces. They also grow on common bread. Mucor may cause infections in man, frogs, amphibians, cattle, and swine.
5. 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.
6. Which of the following cells are closely associated and interacting with guard cells?
[A] Transfusion tissue
[B] Complementary cells
[C] Subsidiary cells
[D] Hypodermal cells
Show Answer
Correct Answer: C [Subsidiary cells]
Notes:
Subsidiary cells are the accessory cells to guard cells in the epidermis of plants. Two or four subsidiary cells are found surrounding the pair of guard cells. Subsidiary cells do not consist of chloroplasts. They provide support for the functioning of guard cells in the epidermis.
7. Xylem helps in transportation of which of the following?
[A] Food
[B] Water
[C] Both food and water
[D] Nutrients
Show Answer
Correct Answer: B [Water]
Notes:
Xylem is a type of tissue in vascular plants that transports water and some nutrients from the roots to the leaves. Water is passively transported into the roots and then into the xylem. The forces of cohesion and adhesion cause the water molecules to form a column in the xylem.
8. Which one of the following is a fast growing tree? (UPSC Prelims 1979).
[A] Teak
[B] Eucalyptus
[C] Banyan
[D] Coconut
Show Answer
Correct Answer: B [Eucalyptus]
Notes:
Eucalyptus is the fast growing tree. Most eucalyptus species have a root depth of 1.5-2.0 metre and its root system is more specifically adapted to using rain-fed soil moisture from the upper soil profile, rather than from the groundwater table at considerable depth. The plant is significant for wood availability, livelihood generation and carbon sequestration that address the challenges of global warming and climate change.
9. Which of the following is caused by massive deforestation? (UPSC Prelims 1986)
[A] Soil erosion
[B] Famine
[C] Floods
[D] None of these
Show Answer
Correct Answer: A [Soil erosion]
Notes:
Deforestation causes soil erosion. Tree roots anchor the soil. Without trees, the soil is free to wash or blow away, which can lead to vegetation growth problems.
10. The theory of DNA structure and nature was propounded by __?
[A] Oswald Avery
[B] James Black
[C] Watson and Crick
[D] John Eccles
Show Answer
Correct Answer: C [Watson and Crick]
Notes:
Watson and Crick realized that DNA was made up of two chains of nucleotide pairs that encode the genetic information for all living things.
