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- Question
Which one of the following cell organelles mainly functions as storehouse of digestive enzymes?
Options- A. Desmosome
- B. Ribosome
- C. Lysosome
- D. Vacuoles
- Correct Answer
- Lysosome
ExplanationLysosome is found in nearly all types of eukaryotic cells (cells with a clearly defined nucleus) and is responsible for the digestion of macromolecules, old cell parts, and microorganisms. Each lysosome is surrounded by a membrane that maintains an acidic environment within the interior via a proton pump. Lysosomes contain a wide variety of hydrolytic enzymes (acid hydrolases) that break down macromolecules such as nucleic acids, proteins, and polysaccharides. So, they are known as storehouse of digestive enzymes.
- 1. The monomer/monomers used for the synthesis of Nylon 6 is/are
Options- A. hexamethylenediamine and adipic acid
- B. caprolactam
- C. urea and formaldehydeD.
- D. phenol and formaldehyde Discuss
- 2. Which of the following pairs is INCORRECT? I. Haematite : Iron II. Pitchblende : Copper III. Monazite : Thorium
Options- A. Only I
- B. Only II
- C. Only I and Only II
- D. Only I and Only III Discuss
- 3. What are isobars?
Options- A. Elements with same atomic number but different mass number
- B. Elements with different atomic number but same mass number
- C. Elements with different atomic number and different mass number
- D. Elements with same atomic number and same mass number Discuss
- 4. Which of the following is most important for absorption of heat radiated from the Sun as well as from the Earth?
Options- A. Carbon dioxide
- B. Oxygen
- C. Carbon monoxide
- D. Nitrogen Discuss
- 5. Which one of the following statements is not correct?
Options- A. Fischer projection represents the molecule in an eclipsed conformation
- B. Newman projection can be represented in eclipsed, staggered and skew conformations
- C. Fischer projection of the molecule is its most stable conformation
- D. In Sawhorse projections, the lines are inclined at an angle of 120 deg to each other. Discuss
- 6. The PCl5 molecule has trigonal bipyramidal structure. Therefore,the hybridization of p orbitals should be
Options- A. sp2
- B. sp3
- C. dsp2
- D. dsp3 Discuss
- 7. Which one of the following statements regarding histone proteins is correct?
Options- A. Histones are proteins that are present in mitochondrial membrane
- B. Histones are proteins that are present in nucleus in association with DNA
- C. Histones are proteins associated with lipids in the cytosol
- D. Histones are proteins associated with carbohydrates in the cytosol Discuss
- 8. Process of gaining electrons is known as _____.
Options- A. oxidation
- B. reduction
- C. radiation
- D. both oxidation and reduction Discuss
- 9. Besides CO2, the other green house gas is
Options- A. CH4
- B. N2
- C. Ar
- D. O2 Discuss
- 10. When Granite rocks get metamorphosed, they form
Options- A. Quartzite
- B. Gneiss
- C. Marble
- D. Slate Discuss
Chemistry problems
Search Results
Correct Answer: hexamethylenediamine and adipic acid
Explanation:
Nylon is made when the appropriate monomers (the chemical building blocks which make up polymers) are combined to form a long chain via a condensation polymerisation reaction. The monomers for nylon 6-6 are adipic acid and hexamethylene diamine
Correct Answer: Only II
Correct Answer: Elements with different atomic number but same mass number
Correct Answer: Carbon dioxide
Correct Answer: Fischer projection of the molecule is its most stable conformation
Explanation:
Fischer projections were originally proposed for the depiction of carbohydrates and used by chemists, particularly in organic chemistry and biochemistry.A Fischer projection always uses an eclipsed conformation. A Newman diagram can represent either an eclipsed conformation or a staggered conformation or a skew conformation.
Correct Answer: dsp3
Explanation:
The P atom needs five orbitals to form the five P-Cl bonds. It has a 3s and three 3p orbitals, so it must use one of its 3d orbitals to form the fifth bond. These orbitals are hybridized to form five sp3d orbitals that just happen to point in the right directions to form a trigonal bipyramid.
Correct Answer: Histones are proteins that are present in nucleus in association with DNA
Explanation:
Histones are highly alkaline proteins found in eukaryotic cell nucleusthat package and order the DNA into structural units called nucleosomes. They are the chief protein components of chromatin, acting as spools around which DNA winds, and playrole in gene regulation.
Correct Answer: reduction
Correct Answer: CH4
Correct Answer: Gneiss
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