Chemistry problems
- 1. What type of Lipid is Estrogen?
Options- A. phospholipid
- B. steroid
- C. wax
- D. triglyceride Also asked in: AIEEE, Bank Exams, Analyst, Bank Clerk, Bank PO, IT Trainer
Correct Answer: steroid
Explanation:
Estrogen is a group of steroid hormone that control the development and maintenance of an individuals feminine characteristics. Natural estrogen exists in men as well as women and are found in higher amounts in women Especially in those of reproductive age.
Estrogens are hormones which are responsible to the body functions of the female body system such as menstruation, development of the female body such as pubic hair, breasts and development of the proportions of the body.
Lipids act as best energy storage molecules as the cleavage of fatty acids produces both energy and metabolic water which is a main component in almost all lipids.
- 2. What is the freezing point of water in Celsius?
Options- A. 0 deg C
- B. 32 deg C
- C. -42 deg C
- D. -32 deg C Also asked in: AIEEE, Bank Exams, GATE, Analyst, Bank Clerk
Correct Answer: 0 deg C
Explanation:
The freezing point of water and melting point is 0 °C or 32 °F. The temperature may be lower if supercooling occurs.
- 4. Lime is sometimes applied to soil in order to
Options- A. increase the acidity of the soil
- B. make the soil more porous
- C. restore nitrates to the soil
- D. increase the alkalinity of the soil Also asked in: AIEEE, Bank Exams, CAT, Analyst, Bank Clerk
Correct Answer: increase the alkalinity of the soil
Explanation:
Lime is sometimes applied to soil in order to increase the acidity of the soil.
- 5. Which path through the carbon cycle is possible?
Options- A. Animal ----> Plant ----> Atmosphere
- B. Plant ----> Animal ----> Atmosphere
- C. Atmosphere ----> Plant ----> Animal
- D. Plant ----> Atmosphere -----> Animal Also asked in: AIEEE, Bank Exams, CAT, Analyst, Bank Clerk, Bank PO
Correct Answer: Plant ----> Animal ----> Atmosphere
Explanation:
During daylight hours, plants capture carbon dioxide from the atmosphere and use it to make carbohydrates which is stored as starch in the plant. Animals feed on the plants and extract the carbohydrates through their digestive system. The carbohydrates, namely glucose, are used by the animals for production of ATP through cellular respiration.
Cellar respiration in the animals produces carbon dioxide as a waste product. The carbon dioxide is released into the atmosphere, from where it is again captured by plants and the cycle is repeated.
Hence, option B) Plant ----> Animal ----> Atmosphere is the path possible in carbon cycle.
- 6. Which of the following polysaccharides contains a modified monosaccharide?
Options- A. starch
- B. chitin
- C. glycogen
- D. cellulose Also asked in: AIEEE, Bank Exams, Analyst, Bank Clerk, Bank PO
Correct Answer: chitin
Explanation:
Many carbohydrates contain one or more modified monosaccharide units that have had one or more groups replaced or removed.
Chitin is one of many naturally occurring polymers. It is one of the most abundant natural materials in the world. Over time it is bio-degradable in the natural environment. Its breakdown may be catalyzed by enzymes called chitinases, secreted by microorganisms such as bacteria and fungi, and produced by some plants.
Chitin is composed of repeating units of N-acetylglucosamine, a nitrogen-containing form of glucose.
- 7. Tertiary structure is NOT directly dependent on
Options- A. hydrogen bonds
- B. ionic bonds
- C. peptide bonds
- D. hydrophobic interactions Also asked in: AIEEE, Bank Exams, CAT, Analyst, Bank Clerk, Bank PO
Correct Answer: peptide bonds
- 8. What type of bond is joining the two hydrogen atoms?
Options- A. Hydrophobic
- B. Ionic
- C. Covalent
- D. Hydrophilic Also asked in: GATE, CAT, Bank Exams, AIEEE, Bank PO, Bank Clerk, Analyst
Correct Answer: Covalent
Explanation:
Covalent type of bonding joins The two hydrogen atoms are joned by Covalent type of bonding.
In this type of bonding, electrons are shared between the atoms in order to fill there valence shells. Thus sharing of electrons take place in between the hydrogen atoms.
- 9. Gases used in normal welding?
Options- A. Oxygen and Acetylene
- B. Acetylene and Nitrogen
- C. Oxygen, Hydrogen and Acetylene
- D. Oxygen and Hydrogen Also asked in: AIEEE, Bank Exams, CAT, GATE, Analyst, Bank Clerk, Bank PO
Correct Answer: Oxygen and Acetylene
Explanation:
Normal Gas welding use oxygen-acetylene.
Depending on what materials you are welding, there are some more options that might be used.
For example - MIG/TIG use Argon, MAG use an argon-something mix.
- 10. Proteins differ from one another because
Options- A. The peptide bonds linking amino acids differ from protein to protein
- B. Each protein contains its own unique sequence of sugar molecules
- C. The number of nucleotides found in each protein varies from molecule to molecule
- D. The sequence of amino acids in the polypeptide chain differs from protein to protein Also asked in: AIEEE, Bank Exams, GATE, Analyst, Bank Clerk, Bank PO, Database Administrator
Correct Answer: The sequence of amino acids in the polypeptide chain differs from protein to protein
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