General Science - Biology MCQs
31. Mendel did not give __.
[A] Concept of genes
[B] Concept of inheritance
[C] Concept of dominance
[D] Concept of chromosomes
Correct Answer: D [Concept of chromosomes]
Mendel did not give the Concept of chromosomes. The chromosomal theory of inheritance was given by Boveri and Sutton.
32. Which of the following is an example of chromosomal disorders?
[A] Down’s syndrome
[D] Sickle cell anaemia
Correct Answer: A [Down’s syndrome]
Down’s syndrome is an example of a chromosomal disorder. Whereas Albinism, Haemophilia, and Sickle cell anemia are examples of Mendelian Disorder.
33. Which of the following are the main sources of biofertilizers?
[D] All of the above
Correct Answer: D [All of the above]
Bacteria, cyanobacteria and fungi are the main sources of biofertilizers. These trap atmospheric nitrogen and reduce it to ammonia and make it available to plants. They also convert insoluble phosphates into forms required by plants.
34. Green manure plants belong to which of the following?
Correct Answer: D [Leguminosae]
Green manure plants belong to Leguminosae. Leguminosae are commonly known as the legume, pea, or bean family.
35. What is Southern blotting?
[A] Attachment of probes to DNA fragments
[B] Transfer of DNA fragments from electrophoretic gel to a nitrocellulose sheet
[C] Comparison of DNA fragments to two sources
[D] Transfer of DNA fragments to electrophoretic gel from cellulose membrane
Correct Answer: B [Transfer of DNA fragments from electrophoretic gel to a nitrocellulose sheet]
Southern blotting is the transfer of DNA fragments from electrophoretic gel to a nitrocellulose sheet.
36. The technique of __ crosses the limits of conventional hybridization processes.
[B] modern hybridization
[C] genetic engineering
[D] cell biology
Correct Answer: C [genetic engineering]
The technique of genetic engineering crosses the limits of conventional hybridization processes.
37. First successful heart transplantation was done by
[A] D.S. Paintal
[B] C.N. Barnard
[C] D. Shetty
[D] P. K. Sen
Correct Answer: B [C.N. Barnard]
Dr. Christian Barnard was a South African cardiac surgeon who performed the world’s first successful human-to-human heart transplant on 3 December 1967, in an operation assisted by his brother, Marius Barnard. The operation lasted nine hours and used a team of thirty people.
38. Where does the cabbage store food?
Correct Answer: A [Leaves]
Cabbages have no need to store food as they are seasonal plants and die after about 4 to 6 months. They do however produce food in the leaves of the plants and would utilize short-term storage (in the leaves) for simple metabolic processes.
39. DPT vaccine is categorized as which of the following?
[A] Anti viral vaccine
[B] Anti protozoan vaccine
[C] Anti ricket-sial vaccine
[D] A combined vaccine
Correct Answer: D [A combined vaccine]
DPT refers to a class of combination vaccines against three infectious diseases in humans: diphtheria, pertussis (whooping cough), and tetanus. The vaccine components include diphtheria and tetanus toxoids and killed whole cells of the organism that cause pertussis (wP).
40. What are Lipids?
[A] Lipids are monosaccharides
[B] Lipids do not provide energy to cells
[C] Fruits are a good source of lipids
[D] Cholesterol and trans fatty acids are types of Lipids
Correct Answer: D [Cholesterol and trans fatty acids are types of Lipids]
Lipids are a group of naturally occurring molecules that include fats, waxes, sterols, fat-soluble vitamins (such as vitamins A, D, E, and K), monoglycerides, diglycerides, triglycerides, phospholipids, and others. They encompass molecules such as fatty acids and their derivatives (including tri-, di-, monoglycerides, and phospholipids), as well as other sterolcontaining metabolites such as cholesterol.