General Science - Biology MCQs - Set 4

1)   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
Answer  Explanation 

ANSWER: Parasitic Plant

Explanation:
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.


2)   For Lemurs, which among the following is a correct group to place in ?

a. Rodents
b. Primates
c. Bats
d. Sloths
Answer  Explanation 

ANSWER: Primates

Explanation:
Lemurs are mammals of the order Primates which are native only to the island of Madagascar. They are divided into 8 families and it consists of 15 genera and around 100 existing species.


3)   Which among the following is the only internal human organ which can regenerate?

a. Pancreas
b. Kidney
c. Liver
d. Spleen
Answer  Explanation 

ANSWER: Liver

Explanation:
Liver is the only internal human organ which can regenerate. It detoxifies various metabolites, synthesizes proteins and produces biochemicals which are necessary for digestion and growth.


4)   Biologists have been able to demonstrate the hearing and sound sensory mechanism through the acoustico-lateralis system in which of the following vertebrates ?

a. amphibians
b. snakes
c. fishes
d. Birds
Answer  Explanation 

ANSWER: fishes

Explanation:
Biologists have been able to demonstrate the hearing and sound sensory mechanism through the acoustico-lateralis system in fishes.


5)   In which of the following, the cellular power plants – Mitochondria are absent ?

a. Red algae
b. Green Algae
c. Bacteria
d. Brown Algae
Answer  Explanation 

ANSWER: Bacteria

Explanation:
The mitochondria are common in Eukaryotic cells. Bacteria is Prokaryotic


6)   Which among the following does not fall in the category of morbid fear or Phobia?

a. Claustrophobia
b. Photophobia
c. Photophobia
d. Anthophobia
Answer  Explanation 

ANSWER: Photophobia

Explanation:
Photophobia is not a fear. It is excessive sensitivity to light and the aversion to sunlight or well-lit places,
Claustrophobia is fear of confined places,
Algophobia is fear of pain,
Anthophobia is fear of flowers,


7)   Which of the following plant growth hormone was recognized by Japanese scientists?

a. Auxin
b. Gibberellins
c. Abscisic acid
d. Cytokinin
Answer  Explanation 

ANSWER: Gibberellins

Explanation:
Gibberellins, first recognized in 1926 by a Japanese scientist, Eiichi Kurosawa. He was studying foolish seedling disease in Rice called as bakanae


8)   The Gram Positive Bacteria can be identified by the Gram staining because of the following reasons?

a. The cell walls have more lipids compared to peptidoglycan
b. The Cells walls have more Peptidoglycan compared to Lipids
c. The Cells membrane has more fatty acids
d. The plasma has Peptidoglycans
Answer  Explanation 

ANSWER: The Cells walls have more Peptidoglycan compared to Lipids

Explanation:
The cell wall which is made up of Peptidoglycan as well as lipids gets violet due to the reaction of the CV+. After the decolorization with alcohol, the lipids gets dissolved and the bacteria with higher Peptidoglycan remain violet. These are called Gram Positive bacteria.


9)   Consider the following statements:
1: For some diseases like Malaria and Denue, techniques of Population suppression of Vectors is favored over the disease resistance techniques
2: RIDL is a Population suppression technique.
Which among the above statements is / are correct?


a. Only 1 is correct
b. Only 2 is correct
c. Both 1 & 2 are correct
d. Neither 1 nor 2 is correct
Answer  Explanation 

ANSWER: Both 1 & 2 are correct

Explanation:
For some diseases like Malaria and Denue, techniques of Population suppression of Vectors is favored over the disease resistance techniques. RIDL is a Population suppression technique.


10)   Which among the following is the correct meaning of Phyllotaxy?

a. Classification of plants as per the leaves structure
b. The manner of arrangement of leaves in stem or branch
c. The manner the leaves fall from the branches
d. The anatomy of leaves in angiosperms
Answer  Explanation 

ANSWER: The manner of arrangement of leaves in stem or branch

Explanation:
Phyllotaxy means the manner of arrangement of leaves in stem or branch. It is the arrangement of leaves on a plant stem. Phyllotactic spirals usually form a distinctive class of patterns in nature.