1. A treatment with which among the following plant hormones would prevent water loss from the plant leaves, by reducing transpiration, in times of low water availability?
[A] Ethylene
[B] Abscisic Acid
[C] Gibberelic Acid
[D] Auxin
Show Answer
Correct Answer: B [Abscisic Acid]
Notes:
A treatment with abscisic acid would prevent water loss from the plant leaves, by reducing transpiration, in times of low water availability.
2. Human Papilloma Virus is related to which of the following diseases?
[A] Prostate Cancer
[B] Cervical Cancer
[C] Lymphatic Filariasis
[D] Leukemia
Show Answer
Correct Answer: B [Cervical Cancer]
Notes:
Human papilloma virus (HPV) is a viral infection that’s passed between people through skin-to-skin contact. There are over 100 varieties of HPV. Human Papilloma Virus is 0related to Cervical cancer.
3. The greatest degree of genetic variability would be expected among organisms that reproduce via__?
[A] Budding
[B] Sporulation
[C] Sexual Recombination
[D] Vegetative Propagation
Show Answer
Correct Answer: C [ Sexual Recombination]
Notes:
Genetic variability is usually due to a mutation during meiosis (sexual reproduction). In the above question, the answer choices (B) and (D) are examples of asexual reproduction. They create identical offspring.
4. 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
Show Answer
Correct Answer: B [ The Cells walls have more Peptidoglycan compared to Lipids]
Notes:
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.
5. The study of Improvement of human race by improving environment is known as ?
[A] Euthenics
[B] Eugenics
[C] Euphenics
[D] Etiology
Show Answer
Correct Answer: A [Euthenics]
Notes:
Euthenics is the branch of biology that studies the improvement of human race by improving environment. Eugenics is the branch of biology that studies the Improvement of human race through laws of heredity. Euphenics is the branch of biology that studies the improvement of human race by drug treatment or genetic engineering. Etiology is the branch of biology that studies the Life cycle of causal organisms of the disease.
6. What does the first name in the scientific name of an organism denote?
[A] Species
[B] Genus
[C] Order
[D] Class
Show Answer
Correct Answer: B [ Genus ]
Notes:
In Binominal nomenclature, the name of organisms is in genus species pattern. The second word in an organism’s scientific name refers to one species within the genus; is the specific epithet but actually gives no clue as to species if used alone.
7. Which of the following is not a feature of organisms in the class Mammalia ?
[A] milk producing mammary glands
[B] cells with a membrane-bounded nucleus
[C] dorsal hollow nerve chord
[D] chitin in the cell membrane
Show Answer
Correct Answer: D [ chitin in the cell membrane ]
Notes:
Organisms in the class Mammalia all have milk producing mammary glands; cells with a membrane-bounded nucleus and a dorsal hollow nerve cord. Chitin in Cell Walls is the feature of Kingdom fungi.
8. Which of the following is the hybrid between a horse and a donkey?
[A] Mule
[B] Hule
[C] Tigon
[D] Zorse
Show Answer
Correct Answer: A [Mule]
Notes:
A mule is the offspring of a male donkey (a jack) and a female horse (a mare). A horse has 64 chromosomes, and a donkey has 62. The mule ends up with 63. Mules can be either male or female, but, because of the odd number of chromosomes, they can’t reproduce
9. Who among the following coined the term ‘gene’?
[A] De Vries
[B] W.L. Johanssen
[C] T. H. Morgan
[D] G. Mendel
Show Answer
Correct Answer: B [ W.L. Johanssen ]
Notes:
Wilhelm Johannsen was a Danish botanist, plant physiologist, and geneticist. He is best known for coining the terms gene, phenotype and genotype, and for his 1903 “pure line” experiments in genetics.
10. Which among the following is also called as ‘power house of the cell’?
[A] Cell wall
[B] Mitochondria
[C] Golgi bodies
[D] Plastids
Show Answer
Correct Answer: B [Mitochondria]
Notes:
Mitochondria is known as the Powerhouse of the Cell as it plays host to one of the most important processes in your body: cellular respiration. Taking in glucose and oxygen, mitochondria produce energy, which they capture and package as energy-rich molecules of ATP.
