Biology Practice MCQ Page 19

Multiple Choice questions for Biology in the sets of 10 each on one page with questions and answers. All sets are useful in the preparation of subject tests for employment or admission.
Question: 2219   Solubility of fatty acids in organic solvents and their melting points ------ with increasing number of carbon atoms in chain.
  1. increase.
  2. decrease.
  3. remains constant .
  4. none of the above.
Question: 2221   They are widespread as protective coatings on fruits and leaves.
  1. Chitin.
  2. Cholestrol.
  3. Waxes.
  4. None of the above.
Question: 2222   They protect plants from water loss and abrasive damage.
  1. Leaves.
  2. Waxes.
  3. Minerals.
  4. None of the above.
Question: 2223   They are widespread in bacteria,animal and plant cells and are frequently associated with membranes.
  1. Phospholipids.
  2. Trilipids.
  3. Dilipids.
  4. None of the above.
Question: 2225   They are a very large and important group of compounds which is in actual fact made up of a simple repeating units,isoprenoid unit.
  1. Lipids.
  2. Terpenoids.
  3. Cellulose.
  4. None of the above.
Question: 2226   They constitute major source of energy ,and play an intimate role in the structure of membranes of the cell and organelles found in the cell.
  1. Waxes.
  2. Glesrides.
  3. Lipids.
  4. None of the above.
Question: 2227   Typically a----------- is composed of three composed i.e.pentose sugar,nitrogenous base ,and phosphoric acid.
  1. DNA.
  2. Nucleotide.
  3. Protein.
  4. Carbohydrates.
Question: 2229   Bases cytosine and thymine are collectively termed as
  1. Purine.
  2. Adenine.
  3. Cytosine.
  4. Pyrimidine.
Question: 2230   It has the ability to develop ester linking OH groups of pentose sugar.
  1. Nucleic acid.
  2. Amino acids.
  3. Citric acids.
  4. Phosphoric acids.
Question: 2231   It is a single poly nucleotide chain.
  1. DNA
  2. RNA
  3. Protein.
  4. None of the above.
Question: 2232   In RNA ,the nitrogenous base thymine of DNA is replaced by the nitrogen base
  1. Adenine
  2. Uracil.
  3. Cytosine.
  4. Guanine.
Question: 2234   It is composed of two polynucleotide chains which are coiled round each other in the form of a double helix.
  1. DNA
  2. RNA
  3. Fats
  4. None of the above.

Answers to the questions of Biology on this page

Following list gives the correct choice for the answer of the Biology mcqs.
2219 . A       2221 . C       2222 . B       2223 . A       2225 . B       2226 . C       2227 . B       2229 . D       2230 . D       2231 . B       2232 . B       2234 . A      

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