Biological Molecules MCQs

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Biological Molecules
1.         Hemoglobin is a protein composed of
            a. Three alpha and one beta chains      b. Three beta and one alpha chains
            c. Two alpha and two beta chains        d. Three alpha and two beta chains
2.         The shape of hemoglobin molecule is like a
            a. Fiber            b. Cigar                        c. Globe                       d. Saucer
3.         In protein synthesis transfer RNA, picks up amino acids and transfers them to
            a. Lysosomes               b. Ribosome                c. Mesosomes              d.Dictyosomes
4.         Peptide bond is a
            a. C - N link     b. C - 0 link                 b. N - H link                d. C- H link
5.         Globular proteins differ from fibrous proteins in
            a. Having amino acids                         b. Their repeating units joined by peptide bond
            c. Being soluble in aqueous medium   d. Being non-crystalline
6.         Which of the following has the most chemical elements present in all proteins?
            a. Nitrogen only                                   b. Hydrogen and nitrogen       
            c. Nitrogen and oxygen                        d. Hydrogen, nitrogen. And oxygen
7.         Which one of tbe following is the chief use of protein in the body?
            a. A source of urea      b. A source of energy              c. A growth material    d. A bone salt
8.         Amino acids are joined to each other to form' polypeptides by condensation (dehydration synthesis) of the  ---
            functional group on the amino acid at the growing end of the polypeptide with the ----- functional group on the next amino acid to be added to the chain.
            a. carboxyl, hydroxyl  b. Hydroxyl, carboxyl             c. Carboxyl, amino      d. Hydroxyl, hydroxyl
9.         The sequence of amino acids in a polypeptide chain is the ------ structure of the protein.
            a. Primary        b. Secondary                c. Tertiary                    d. Quaternary
10.       The number- of different kinds of amino acids occurring in a protein molecule is
            a. 10                b. 20                c. 30                d. 40
11.       What is the number of amino acids in alpha chain of hemoglobin?
            a. 140              b. 141              c. 146              d. 147
12.       An amino acid bas at least one amino (-NH3) and one carboxyl (-COOH) group bounded to the same carbon atom     called
            a. Alpha carbon           b. Beta carbon             c. Secondary carbon                d. Tertiary carbon
13.       What is the number of amino acids in an insulin molecule?
            a. 21                b. 30                c. 41                d. 51
14.       A chain containing three amino acids ill called
            a.  Dipeptide    b. Tripeptide                c. Pentapeptide            d. Polypeptide
15.       What is the total number of amino acids in human hemoglobin?
            a. 571              b. 512              c. 574              d. 576
16.       What is the total number of  different amino acids that form a protein molecule?
            a. 15                b. 20                c. 25                d. 30
17.       In animals the fatty acids are in
            a. Branched chain        b. Straight chain           c.  Ring                        d. Ring and straight chain
18.       Oleic-acid is a common example of
            a. Unsaturated fatty acid          b. Saturated fatty acid  c. Super saturated fatty acid     d. None of these
19.       What is the total number of carbon atoms in a molecule of palmatic acid?
            a. 14                b. 15                c. 16                d. 17
20.       Hormones are mostly composed of
            a. Amino acids                         b. Fatty acids               c. Inorganic acids         d. Nucleic Acids
21.       Insulin has 51 amino acids, arranged in how many polypeptide chains?
            a. One              b. Two             c. Three                       d. Four
22.       There are three hydrogen bonds between
            a. Cytosine and Guanine          b. Adenine and thiamin                       c. Adenine and uracil   d. Thiamin and uracil
23.       Amino acids are arranged in proper sequence during protein synthesis according to the instructions transcribed on
            a. Transfer RNA          b. Ribosomal RNA      c. Messenger RNA                   d. DNA
24.       Messenger RNA receives its instructions from
            a. Ribosomes               b. Endoplasmic reticulum        c. DNA in the nucleus             d. Cytoplasm
25.       ATP is a
            a. Polysaccharide         b. Fat               c. Nucleotide               d. Protein
26.       A molecule containing ribose, phosphate, purines, and pyrimidines is a
            a. Protein         b. Phospholipid                        c .Carbohydrate           d. Nucleic acid
27.       Energy is routinely released from ATP (in cells) by
            a. Converting the entire molecule to CO2 and water     b. Hydrolyzing the adenine from the ribose
            c. Hydrolyzing one or two phosphates from the molecules     d. None of the These
28.       If one strand of a DNA molecule contains the sequence 3'A-C-G-T-A5', the other strand of the DNA molecule          could contain the sequence ------- at the same location
            a. 3'A-C-G-T-A5'         b. 3'A-C-G-U-A5'        c.  5'T-G-C-A-T3'        d. 5'U-G-C-A-U3'
29.       Transfer RNA carries ------ to the site of  ------ synthesis.
            a. Nucleotides, DNA    b. Nucleotides, RNA    c. Amino acids, protein                        d. Amino acids, DNA
30.       Most amino acids are specified by coadons containing ------ in mRNA.
            a. A single nucleotide              b. Pairs of nucleotides            
            c. Triplets of nucleotides         d. Sets of four nucleotides
31.       Basic unit of nucleic acid is a
            a. Nucleotide               b. Pentose sugar                       c. Phosphate group      d. Purine or pyrimidine
32.       Which of the following is not found in DNA?
            a. Sugar                        b. Uracil                       c.  Nitrogen bases        d. Phosphate
33.       Chemically DNA differs from RNA in one of the following
            a. Adenine present in DNA and Guanine present in RNA.
            b. Deoxyribose and thymine present in DNA while ribose and uracil present in RNA
            c. Ribose and thymine are present in DNA while deoxyribose and uracil are present in RNA
            d. Guanine in DNA and cytosine in RNA
34.       Nucleic acids are polynucleotide chains in which unit, known as nucleotides are linked to each by
            a. Hydrogen bonding   b. Peptide linkage        c. Ester linkage            d. Covalent bond
35.       The melting point of palmitic acid is
            a. 70°C            b. 72°C            c. 80°C            d. 73oC
36.       Nucleic acids are made up of
            a. Pyrimidines              b. Purines         c. Nucleotides              d. Phosphates
37.       In RNA, the nitrogenous base thymine of DNA is replaced by
            a. Adenine                   b. Uracil           c. Cytosine                   d. Guanine
38.       The number of strands in a molecule of DNA is
            a. Two             b. Four                                     c. Three                       d. One
39.       Which one of the following combinations represents a, typical nucleotide?
            a. Phosphoric acid, pentose, sugar and nitrogenous base
            b. Nitrogenous base and pentose Sugar                        c. Phosphoric acid and nitrogenous base
            d. Pentose sugar and phosphoric acid
40.       The two helices of DNA are held together by
            a. Phosphodicster linkage        b. Glycoside linkage    c. Weak hydrogen bonds         d. Peptide bonds
41.       What is the amount of DNA in a germ cell of chicken?
            a. Equal to the amount of somatic cell             b. Half the amount of somatic cell
            c. Double the mount of somatic cell                d. One-third the amount of somatic cell
42.       The evidence that DNA is the, genetic material came first from studies on which of the following organisms?
            a. Rhizobium               b. Pneumococcus         c. Clostridium              d. E. Coli
43.       DNA contains all the following nitrogenous base units except
            a. Adenine                   b. Guanine                   c. Cytosine                   d. Uracil
44.       What is the hereditary material in the cell?
            a. RNA                        b. DNA                        c. Protein                     d. Amino acid
45.       Which of the following is a complete monomeric unit of DNA?
            a. Nucleotide               b. Pentose sugar                       c. Phosphoric acid       d. Purine base
46.       All of the following are pyrimidines bases except
            a. Guanine                   v. Uracil                       c. Thymine                  d. Cytocine

 Biological Molecules
1.         Hemoglobin is a protein composed of
            a. Three alpha and one beta chains      b. Three beta and one alpha chains
            c. Two alpha and two beta chains        d. Three alpha and two beta chains
2.         The shape of hemoglobin molecule is like a
            a. Fiber            b. Cigar                        c. Globe                       d. Saucer
3.         In protein synthesis transfer RNA, picks up amino acids and transfers them to
            a. Lysosomes               b. Ribosome                c. Mesosomes              d.Dictyosomes
4.         Peptide bond is a
            a. C - N link     b. C - 0 link                 b. N - H link                d. C- H link
5.         Globular proteins differ from fibrous proteins in
            a. Having amino acids                         b. Their repeating units joined by peptide bond
            c. Being soluble in aqueous medium   d. Being non-crystalline
6.         Which of the following has the most chemical elements present in all proteins?
            a. Nitrogen only                                   b. Hydrogen and nitrogen       
            c. Nitrogen and oxygen                        d. Hydrogen, nitrogen. And oxygen
7.         Which one of tbe following is the chief use of protein in the body?
            a. A source of urea      b. A source of energy              c. A growth material    d. A bone salt
8.         Amino acids are joined to each other to form' polypeptides by condensation (dehydration synthesis) of the  ---
            functional group on the amino acid at the growing end of the polypeptide with the ----- functional group on the next amino acid to be added to the chain.
            a. carboxyl, hydroxyl  b. Hydroxyl, carboxyl             c. Carboxyl, amino      d. Hydroxyl, hydroxyl
9.         The sequence of amino acids in a polypeptide chain is the ------ structure of the protein.
            a. Primary        b. Secondary                c. Tertiary                    d. Quaternary
10.       The number- of different kinds of amino acids occurring in a protein molecule is
            a. 10                b. 20                c. 30                d. 40
11.       What is the number of amino acids in alpha chain of hemoglobin?
            a. 140              b. 141              c. 146              d. 147
12.       An amino acid bas at least one amino (-NH3) and one carboxyl (-COOH) group bounded to the same carbon atom     called
            a. Alpha carbon           b. Beta carbon             c. Secondary carbon                d. Tertiary carbon
13.       What is the number of amino acids in an insulin molecule?
            a. 21                b. 30                c. 41                d. 51
14.       A chain containing three amino acids ill called
            a.  Dipeptide    b. Tripeptide                c. Pentapeptide            d. Polypeptide
15.       What is the total number of amino acids in human hemoglobin?
            a. 571              b. 512              c. 574              d. 576
16.       What is the total number of  different amino acids that form a protein molecule?
            a. 15                b. 20                c. 25                d. 30
17.       In animals the fatty acids are in
            a. Branched chain        b. Straight chain           c.  Ring                        d. Ring and straight chain
18.       Oleic-acid is a common example of
            a. Unsaturated fatty acid          b. Saturated fatty acid  c. Super saturated fatty acid     d. None of these
19.       What is the total number of carbon atoms in a molecule of palmatic acid?
            a. 14                b. 15                c. 16                d. 17
20.       Hormones are mostly composed of
            a. Amino acids                         b. Fatty acids               c. Inorganic acids         d. Nucleic Acids
21.       Insulin has 51 amino acids, arranged in how many polypeptide chains?
            a. One              b. Two             c. Three                       d. Four
22.       There are three hydrogen bonds between
            a. Cytosine and Guanine          b. Adenine and thiamin                       c. Adenine and uracil   d. Thiamin and uracil
23.       Amino acids are arranged in proper sequence during protein synthesis according to the instructions transcribed on
            a. Transfer RNA          b. Ribosomal RNA      c. Messenger RNA                   d. DNA
24.       Messenger RNA receives its instructions from
            a. Ribosomes               b. Endoplasmic reticulum        c. DNA in the nucleus             d. Cytoplasm
25.       ATP is a
            a. Polysaccharide         b. Fat               c. Nucleotide               d. Protein
26.       A molecule containing ribose, phosphate, purines, and pyrimidines is a
            a. Protein         b. Phospholipid                        c .Carbohydrate           d. Nucleic acid
27.       Energy is routinely released from ATP (in cells) by
            a. Converting the entire molecule to CO2 and water     b. Hydrolyzing the adenine from the ribose
            c. Hydrolyzing one or two phosphates from the molecules     d. None of the These
28.       If one strand of a DNA molecule contains the sequence 3'A-C-G-T-A5', the other strand of the DNA molecule          could contain the sequence ------- at the same location
            a. 3'A-C-G-T-A5'         b. 3'A-C-G-U-A5'        c.  5'T-G-C-A-T3'        d. 5'U-G-C-A-U3'
29.       Transfer RNA carries ------ to the site of  ------ synthesis.
            a. Nucleotides, DNA    b. Nucleotides, RNA    c. Amino acids, protein                        d. Amino acids, DNA
30.       Most amino acids are specified by coadons containing ------ in mRNA.
            a. A single nucleotide              b. Pairs of nucleotides            
            c. Triplets of nucleotides         d. Sets of four nucleotides
31.       Basic unit of nucleic acid is a
            a. Nucleotide               b. Pentose sugar                       c. Phosphate group      d. Purine or pyrimidine
32.       Which of the following is not found in DNA?
            a. Sugar                        b. Uracil                       c.  Nitrogen bases        d. Phosphate
33.       Chemically DNA differs from RNA in one of the following
            a. Adenine present in DNA and Guanine present in RNA.
            b. Deoxyribose and thymine present in DNA while ribose and uracil present in RNA
            c. Ribose and thymine are present in DNA while deoxyribose and uracil are present in RNA
            d. Guanine in DNA and cytosine in RNA
34.       Nucleic acids are polynucleotide chains in which unit, known as nucleotides are linked to each by
            a. Hydrogen bonding   b. Peptide linkage        c. Ester linkage            d. Covalent bond
35.       The melting point of palmitic acid is
            a. 70°C            b. 72°C            c. 80°C            d. 73oC
36.       Nucleic acids are made up of
            a. Pyrimidines              b. Purines         c. Nucleotides              d. Phosphates
37.       In RNA, the nitrogenous base thymine of DNA is replaced by
            a. Adenine                   b. Uracil           c. Cytosine                   d. Guanine
38.       The number of strands in a molecule of DNA is
            a. Two             b. Four                                     c. Three                       d. One
39.       Which one of the following combinations represents a, typical nucleotide?
            a. Phosphoric acid, pentose, sugar and nitrogenous base
            b. Nitrogenous base and pentose Sugar                        c. Phosphoric acid and nitrogenous base
            d. Pentose sugar and phosphoric acid
40.       The two helices of DNA are held together by
            a. Phosphodicster linkage        b. Glycoside linkage    c. Weak hydrogen bonds         d. Peptide bonds
41.       What is the amount of DNA in a germ cell of chicken?
            a. Equal to the amount of somatic cell             b. Half the amount of somatic cell
            c. Double the mount of somatic cell                d. One-third the amount of somatic cell
42.       The evidence that DNA is the, genetic material came first from studies on which of the following organisms?
            a. Rhizobium               b. Pneumococcus         c. Clostridium              d. E. Coli
43.       DNA contains all the following nitrogenous base units except
            a. Adenine                   b. Guanine                   c. Cytosine                   d. Uracil
44.       What is the hereditary material in the cell?
            a. RNA                        b. DNA                        c. Protein                     d. Amino acid
45.       Which of the following is a complete monomeric unit of DNA?
            a. Nucleotide               b. Pentose sugar                       c. Phosphoric acid       d. Purine base
46.       All of the following are pyrimidines bases except
            a. Guanine                   v. Uracil                       c. Thymine                  d. Cytocine

I am Mechatronics and Control Engineer from UET, Lahore. Helping Engineering students gives me pleasure.

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