1. Which of the following statements is incorrect about the Lysosome?
[A] It is a membrane-bound organelle found in plant as well as animal cells
[B] It is also called the suicidal bag of the cell
[C] It helps in the synthesis of protein
[D] It acts as a dispatch station of protein products received from the endoplasmic reticulum (ER)
Show Answer
Correct Answer: D [It acts as a dispatch station of protein products received from the endoplasmic reticulum (ER)]
Notes:
Golgi apparatus acts as a dispatch station of protein products received from the endoplasmic reticulum (ER). Lysosomes are membrane-bound organelles. They are also called suicide bags because in case of disturbance of their cellular metabolism they digest their own cell by releasing own enzymes. Though lysosomes are not commonly-found in plant cells, but some plant cells do contain lysosomes.
2. Which is the outermost membrane in a mammalian embryo that facilitates exchange between the embryo and environment?
[A] Amnion
[B] Allantois
[C] Chorion
[D] Yolk sac
Show Answer
Correct Answer: C [Chorion]
Notes:
The chorion, being the outermost membrane surrounding a developing embryo, plays a pivotal role in facilitating exchange between the embryo and its environment. It forms part of the fetal membranes that include the amnion, yolk sac, and allantois, nestled below the amniotic sac and in connection with the maternal tissue. The placenta, though not an option here, would still be a correct answer as it is a temporary organ developed during gestation to nourish and oxygenize the developing fetus while eliminating waste products. Both the chorion and the placenta are indispensable for substance exchange between the fetus and mother during gestation.
3. Flowering in long day plants is related to which of the following?
[A] Auxin
[B] Gibberlin
[C] Cytokinin
[D] Ethylene
Show Answer
Correct Answer: B [Gibberlin]
Notes:
Flowering in long day plants is related to Gibberlin. Long-day plants usually flower when the night length falls below their critical photoperiod. Many of our summer blooming flowers and garden vegetables are long day plants.
4. Which of the following disease is found in ground nut?
[A] Downy mildew
[B] Bunt
[C] Ikki
[D] None of the above
Show Answer
Correct Answer: C [Ikki]
Notes:
Ikki disease is found in ground nut. Groundnut is taxonomically classified as Arachis hypogaea, is a legume crop grown mainly for its edible seeds. It is widely grown in the tropics and subtropics.
5. Which among the following plants is known as Indian ginseng?
[A] Withania somnifera
[B] Datura ceratocaula
[C] Iberis amara
[D] Capsella bursa pastoris
Show Answer
Correct Answer: A [Withania somnifera]
Notes:
Withania somnifera or commonly called as Ashwagandha is known as Indian ginseng.
6. Large concentrations of which of the following salts causes the Blue Baby Syndrome?
[A] Phosphates
[B] Nitrates
[C] Sulfates
[D] Carbonates
Show Answer
Correct Answer: B [Nitrates]
Notes:
Infants who drink water contaminated with high levels of nitrate or take foods made with water which is contaminated with nitrate may develop serious health condition due to which infant’s blood is unable to carry enough oxygen to body cells and tissue. This condition is known as methemoglobinemia or “blue baby syndrome.”
7. Hodophobia is the fear of which of the following?
[A] Sleeping
[B] Travel
[C] Drugs
[D] Cattle
Show Answer
Correct Answer: B [Travel]
Notes:
Hodophobia is the fear of travel. It is also referred to as travel phobia or fear of travel. Acute anxiety which is provoked by travel can be treated with anti-anxiety medication.
8. Who among the following scientists is known for devising four criteria designed to establish a causal relationship between a causative microbe and a disease?
[A] Louis Pasteur
[B] Emil Behring
[C] Ivan Pavlov
[D] Robet Koch
Show Answer
Correct Answer: D [Robet Koch]
Notes:
Dr. Robert Koch was a German (Prussian) physician. In 1877 he isolated Bacillus anthracis (causative agent of Anthrax) . He also isolated Tuberculosis bacillus (Causative agent of TB) and Vibrio cholera (causative agent of Cholera). He is also known to develop Koch’s postulates, the four criteria designed to establish a causal relationship between a causative microbe and a disease. He was awarded the Nobel Prize in Physiology or Medicine for his tuberculosis findings in 1905.
9. Chickpeas when soaked in water can swell up to three times their volume. The phenomenon involved in this is called _?
[A] Imbibition
[B] Osmosis
[C] Reverse Osmosis
[D] Diffusion
Show Answer
Correct Answer: A [ Imbibition]
Notes:
The movement of water through semipermeable membrane from region of higher concentration to region of lower concentration is called Osmosis. The uptake or absorbtion of water by solid substance without forming solution is called Imbibition.
10. 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.