6. THE FOLLOWING ARE DESCRIPTION OF NUCLEIC ACIDS. EXCEPT? A. MADE UP ALSO OF A NUCLEOSIDE B. COMPOSED OF CHAINS OF NUCLEOTIDES C. VERY LARGE, COMPLEX MOLECULES D. POLYMERS OF NON-REPEATING UNITS OF NUCLEOTIDES 7. ALL OF THE FOLLOWING ARE TRUE ABOUT DNA, EXCEPT? A. CONTAINS THE NITROGENOUS BASE URACIL B. WITH ALPHA-HELICAL STRUCTURE C. INVOLVED IN PROTEIN SYNTHESIS D. GENETIC CARRIER 8. WHICH OF THE FOLLOWING IS/ARE RESPONSIBLE FOR PROTEIN SYNTHESIS? A. T-RNA B. ALL OF THEM C. R-RNA D. M-RNA 9. WHICH OF THE FOLLOWING CAN AFFECT THE DNA STRUCTURE? A. ALL OF THEM B. UV C. BASE ANALOGUES D. IONIZING RADIATION 10. ALL OF THE FOLLOWING ARE PROTEIN ENZYMES, EXCEPT? A. PEPSIN B. CHYMOTRYPSIN C. PTYALIN D. TRYPSIN
Chemistry of Life
The field in which the chemical properties, structure, location, and biological processes in the body are studied is the chemistry of life. The term chemistry of life incorporates chemistry in the life processes; the study of life processes comes under biology.
Covalent and Ionic Bonds
Atoms of different elements except noble gases do not have a complete octet, so they combine with other atoms to form a chemical bond. When two atoms of the same and different elements mutually share two electrons, one by one, to form a bond between them, the bond is called a covalent bond. On the other hand, an electrovalent or ionic bond is formed when a metal atom transfers one or more electrons to a non-metal atom.
Carbon Bonding
It is basically an association between two C that is formed by sharing a pair of electrons among them. Commonly, this is a single or sigma (σ) bond. Sometimes double or triple or pi (Π) bonds can also be formed. These are formed when orbitals of two C atoms get hybridized.
Alcohols, Phenols and Ethers
Alcohols are hydroxyl (-OH) group or moiety containing organic aliphatic molecule. They are produced when a hydrogen atom of an aliphatic compound is substituted with hydroxyl moiety. The general expression of alcohol is R-OH, where the R is an aliphatic group. Their general formula is CnH2n+2O, where n = number of carbon atoms. If n = 1, then CH4O = CH3OH or methanol, n = 2, C2H6O = C2H5OH ethanol.
6. THE FOLLOWING ARE DESCRIPTION OF
A. MADE UP ALSO OF A NUCLEOSIDE
B. COMPOSED OF CHAINS OF
C. VERY LARGE, COMPLEX MOLECULES
D.
7. ALL OF THE FOLLOWING ARE TRUE ABOUT DNA, EXCEPT?
A. CONTAINS THE NITROGENOUS BASE URACIL
B. WITH ALPHA-HELICAL STRUCTURE
C. INVOLVED IN PROTEIN SYNTHESIS
D. GENETIC CARRIER
8. WHICH OF THE FOLLOWING IS/ARE RESPONSIBLE FOR PROTEIN SYNTHESIS?
A. T-RNA
B. ALL OF THEM
C. R-RNA
D. M-RNA
9. WHICH OF THE FOLLOWING CAN AFFECT THE DNA STRUCTURE?
A. ALL OF THEM
B. UV
C. BASE ANALOGUES
D. IONIZING RADIATION
10. ALL OF THE FOLLOWING ARE PROTEIN ENZYMES, EXCEPT?
A. PEPSIN
B. CHYMOTRYPSIN
C. PTYALIN
D. TRYPSIN
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