11. Which of the following correctly define Amniocentesis? (UPSC Prelims 1988)
[A] Determination of foetal sex
[B] Separation of amino acids
[C] Determination of the sequence of amino acids in a protein
[D] Inducing abortion
Show Answer
Correct Answer: A [Determination of foetal sex]
Notes:
Amniocentesis is a medical procedure used primarily in prenatal diagnosis of chromosomal abnormalities and foetal infections, as well as for sex determination.
12. Which organelle in the cell, other than nucleus, contains DNA? (UPSC Prelims 2001)
[A] Centriole
[B] Golgi apparatus
[C] Lysosome
[D] Mitochondrion
Show Answer
Correct Answer: D [Mitochondrion]
Notes:
Mitochondrion is the organelle in the cell, other than nucleus that contains DNA. Mitochondria are the working organelles that keep the cell full of energy. Mitochondria are small organelles floating free throughout the cell. Some cells have several thousand mitochondria while others have none. Muscle cells need a lot of energy so they have loads of mitochondria.
13. Serology is related to which of the following statements?
[A] Study of dietetics
[B] Study of snakes
[C] Study of serum
[D] Study of seeds
Show Answer
Correct Answer: C [Study of serum]
Notes:
Serology is the study of blood serum (the clear fluid that separates when blood clots).
14. Who introduced the three kingdoms of classification?
[A] RH Whittaker
[B] Ernest Haeckel
[C] Copeland
[D] Carolus Linnaeus
Show Answer
Correct Answer: B [Ernest Haeckel]
Notes:
Plantae, Protista and Animalia are the three kingdom of Classification introduced by Ernest Haeckel.
15. Which of the following virus has its envelope from the host cell nucleus?
[A] Paramyxoviruses
[B] Retroviruses
[C] Orthomyxoviruses
[D] Herpesviruses
Show Answer
Correct Answer: D [Herpesviruses]
Notes:
The Herpesviridae are a large family of DNA viruses. It causes infections and some diseases in animals, including humans. Herpes viruses are divided into three groups: α herpesviruses, herpes simplex virus types 1 and 2.
16. Bacteria used in making of chocolate__?
[A] Lactobacillus bucheri
[B] Lactobacillus cacaonum
[C] monosodium glutamate
[D] Lactobacillus casei
Show Answer
Correct Answer: B [Lactobacillus cacaonum]
Notes:
Lactobacillus cacaonum is a bacteria used in the food packaging industry for making chocolates. Lactobacillus bucheri is helpful in making wine. Lactobacillus casei is used in making cheese. Monosodium glutamate is used in Chinese food to enhance taste.
17. Which of the following includes ‘club fungus’ in this fungal division?
[A] Zygomycota
[B] Deuteromycota
[C] Basidiomycota
[D] Ascomycota
Show Answer
Correct Answer: C [Basidiomycota]
Notes:
Basidiomycota is one of the two larger divisions. Together with the Ascomycota, they constitute the subfamily Dicarya within the kingdom Fungi.
18. What are the vegetative parts of a flower?
[A] Sepals
[B] petals
[C] Both 1 & 2
[D] None of these
Show Answer
Correct Answer: C [Both 1 & 2]
Notes:
Sepals and petals are the vegetative parts of a flower.
19. In the absence of which of the following will photosynthesis not occur in leaves?
[A] Chlorophyll
[B] Guard cells
[C] Space between cells
[D] Vacuole
Show Answer
Correct Answer: A [Chlorophyll]
Notes:
In the absence of chlorophyll, photosynthesis does not occur in leaves. The chlorophyll in leaves helps capture the energy of sunlight. Chlorophyll is a green pigment found in plants.
20. In which of the following hormones is stimulation growth factor found?
[A] Gibberellins
[B] Cytokinins
[C] Auxins
[D] Abscisic Acid
Show Answer
Correct Answer: B [Cytokinins]
Notes:
The stimulating growth factor was found to be cytokinin, a hormone that promotes cell division.
