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Biomolecules Test - 20

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Biomolecules Test - 20
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  • Question 1
    1 / -0
    Soybeans and eggs are rich in 
    Solution
    Protein is a macronutrient necessary for the proper growth and function of the human body. High protein foods include egg, meat, fish, cheese, tofu, beans, lentils, yoghurt, nuts, soya and seeds.
  • Question 2
    1 / -0
    Which sugar is present in nucleic acid ____________.
    Solution
    Answer is option A i.e. "Pentose"
    Nucleic acids are DNA and RNA. The sugar in the DNA molecule is deoxyribose and the one in RNA is ribose sugar. Example of pentose sugar are ribose and deoxyribose sugar.
  • Question 3
    1 / -0
    All enzymes are 
    Solution
    Enzymes are biological catalysts, molecules that can speed up the rate of a reaction without undergoing any permanent change themselves. With the exception of ribozymes, all enzymes are protein based.
  • Question 4
    1 / -0
    Which of the following is a purine?
    Solution
    In DNA, the purine bases adenine and guanine form hydrogen bonds with their complementary pyrimidines, thymine, and cytosine, respectively. This is called as a complementary base pairing. So, guanine is a purine
    So, the correct answer is 'Guanine'
  • Question 5
    1 / -0
    The nitrogen is the essential component of
    Solution
    As the primary structure of the protein is an amino acid sequence i.e., it is a polyamide. The amide group proves the presence of nitrogen. A linear chain of amino acid residues is called a polypeptide. A protein contains at least one long polypeptide. Short polypeptides, containing less than about 20-30 residues, are rarely considered to be proteins and are commonly called peptides, or sometimes oligopeptides. The individual amino acid residues are bonded together by peptide bonds and adjacent amino acid residues.
  • Question 6
    1 / -0
    No cell could live without
    Solution
    Phytochromes are pigment molecules that act as photoreceptors and are found in plants. Enzymes are biocatalysts that cause a change in the rate of a chemical reaction. Chloroplasts are cell organelles that are present mostly in plant cells and help capture sunlight and in photosynthesis. Proteins are biomolecules formed of long amino acid chains that are necessary for a cell to function. Proteins are involved in carrying out nearly all the functions of a cell. So, the correct answer is 'protein'.
  • Question 7
    1 / -0
    Which of the following is found only RNA and not in DNA?
    Solution
    In RNA, Uracil is found but absent in DNA. In RNA, uracil binds to adenine via two hydrogen bonds. In DNA, the uracil nucleobase is replaced by thymine. Uracil could be considered a demethylated form of thymine. Each nucleotide in RNA contains a ribose sugar, with carbons numbered 1' through 5'. A base is attached to the 1' position, in general, adenine (A), cytosine (C), guanine (G), or uracil (U). Adenine and guanine are purines, cytosine and uracil are pyrimidines.
    So, the correct answer is option D.
  • Question 8
    1 / -0
    Only RNA contains which of the following base?
    Solution
    The nucleic acid is made up of five major nitrogenous bases. These nitrogenous bases are adenine (A), guanine (G), thymine (T), and cytosine (C). Adenine is always paired with thymine, and guanine is always paired with cytosine. These are known as base pairs. Uracil is only present in RNA, by replacing thymine. 
    So, the correct answer is option B.
  • Question 9
    1 / -0
    Which of the following is energy rich compound formed in cellular respiration?
    Solution
    During cellular respiration, the energy formed in mitochondria is stored in the form of ATP which is also known as energy currency of the cell. It provides energy for all the life activities by its breakdown into ADP and Pi. ATP contains three phosphate group which has high energy bond. On the hydrolysis of ATP energy is released and ADP formed.
  • Question 10
    1 / -0
    Collagen is a
    Solution
    Scleroproteins is water insoluble protein that occur in hard parts of animal body for providing support and protection. Coagulability is absent but conversion to gelatin can occur. For example, keratin, collagen, elastin, fibroin, chondrin, ossein.
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