1. Which among the following plant hormone plays most important role in establishing dormancy in seeds?
[A] Ethylene
[B] Gibberellic acid
[C] Abscisic Acid
[D] Auxin
Show Answer
Correct Answer: C [Abscisic Acid]
Notes:
Abscisic Acid plays the most important role in establishing dormancy in seeds. Abscisic Acid has also been found to be present in metazoans, from sponges up to mammals including humans.
2. Herpetology is the branch of science that deals with the study of__?
[A] Fishes
[B] Insects
[C] Snakes
[D] Amphibians and Reptiles
Show Answer
Correct Answer: D [Amphibians and Reptiles]
Notes:
Herpetology is the branch of zoology which deals with the study of amphibians such as frogs, toads, salamanders, newts and the gymnophiona; and reptiles such as snakes, lizards, amphisbaenids, turtles, terrapins, tortoises, crocodilians and the tuataras.
3. Among Globulin, Albumin, Glutein and collagen which protein is abundant in Eggs?
[A] Globulin
[B] Collagen
[C] Albumin
[D] Thaimine
Show Answer
Correct Answer: C [Albumin]
Notes:
Albumin is most abundant in eggs. Albumin is a family of globular proteins are water-soluble, moderately soluble in concentrated salt solutions, and experience heat denaturation. Substances which contain albumins are called albuminoids.
4. In which of the following, the cellular power plants – Mitochondria are absent ?
[A] Red algae
[B] Green Algae
[C] Bacteria
[D] Brown Algae
Show Answer
Correct Answer: C [Bacteria]
Notes:
The mitochondria are common in Eukaryotic cells. Bacteria is Prokaryotic
5. The major difference between cartilage and bone is that:
[A] While Bone is a part of skeletal system, cartilage is a part of some other system
[B] While bone is made of collagen and calcium salts, cartilage is made of only collagen
[C] While bones have blood vessels, Cartilage have no blood vessels
[D] All of the above statements are correct
Show Answer
Correct Answer: C [ While bones have blood vessels, Cartilage have no blood vessels]
Notes:
Bones have blood vessels, but cartilage does not. Bones have a network of blood vessels that deliver oxygen and nutrients to the bone marrow. Cartilage is avascular, meaning it doesn’t have blood vessels. Instead, cartilage relies on diffusion to get nutrients from the surrounding environment. Because of this, cartilage heals more slowly than bone.
Cartilage is made up of chondrocyte cells that produce a matrix of collagen, proteoglycan, and elastin fibers. Cartilage is found in the joints, rib cage, ear, nose, throat, and between vertebral disks.
6. Which of the following plants is most likely to present a higher water use efficiency?
[A] Wheat
[B] Rice
[C] Sorghum
[D] Pea
Show Answer
Correct Answer: C [Sorghum]
Notes:
Sorghum is considered to have greater water use efficiency primarily because it is a C4 plant. C4 plants have a unique mechanism to concentrate carbon dioxide levels in their leaves, which in turn drastically improves efficiency in the use of water and nitrogen. Sorghum, with this C4 photosynthesis, is highly tolerant to drought, intense sunlight, and high temperatures.
7. Great Zebra, Lesser Zebra and Spotted Zebra are species of:
[A] Butterfly
[B] Fish
[C] Monkey
[D] Dog
Show Answer
Correct Answer: A [ Butterfly]
Notes:
The Great Zebra, Lesser Zebra and Spotted Zebra are the swallowtail butterfly found in the Southeast Asia, which are relatively common and not threatened species.
8. Golden rice is a variety of rice produced through genetic engineering to biosynthesize beta-carotene. This genetically engineered (GE) rice variety, can help to alleviate deficiency of _?
[A] Vitamin A
[B] Vitamin B
[C] Vitamin C
[D] Vitamin D
Show Answer
Correct Answer: A [Vitamin A]
Notes:
Golden Rice is a genetically engineered (GE) rice variety that has been developed by the biotech industry to produce pro-vitamin A. Vitamin A deficiency can be caused by infections that reduce appetite or the body’s ability to absorb vitamin A or may cause night blindness. Golden Rice has the potential to complement existing efforts that seek to reduce blindness and other VAD induced diseases.
9. Anatomically, the beak of birds is equivalent of which of the following?
[A] Teeth
[B] Cheeks
[C] Jaws
[D] None of the above
Show Answer
Correct Answer: C [Jaws]
Notes:
The beak, bill or rostrum is an external anatomical structure of birds that is used for eating and for preening, manipulating objects, killing prey, fighting, probing for food, etc. All beaks are composed of two jaws, generally known as the upper mandible (or maxilla) and lower mandible (or mandible).
10. Who among the following analysed the DNA for the first time ?
[A] Watson and Krick
[B] Karl von Frisch
[C] M. W. Nirenberg
[D] Hargobind Khurana
Show Answer
Correct Answer: A [Watson and Krick]
Notes:
The discovery in 1953 of the double helix, the twisted-ladder structure of deoxyribonucleic acid (DNA), by James Watson and Francis Crick marked a milestone in the history of science and gave rise to modern molecular biology, which is largely concerned with understanding how genes control the chemical processes.
