Biology assignment
Bio-Assignment02: week two
Term: 2019 Summer
Assignment 2
Name: ___________________________ Time: _______________ Total: _________
1. True or False
(i) Viruses contain either RNA or DNA as a genetic material. Answer:___________
(ii) Virus having an arthropod as vector or intermediate host is called arbovirus.
Answer:___________
2. Select the correct pair. Answer:___________
(a) Acidic amino acid - Arginine
(b) Basic amino acid - Phenylalanine
(c) Alcoholic amino acid - Threonine
(d) Neutral amino acid – Cysteine
3. Which of the following is an example of polysaccharides? Answer:__________
(a) Sucrose (b) Maltose (c) Raffinose (d) Cellulose
4. Select the correct statement regarding nucleic acids. Answer:__________
(a) These are long chain micromolecules formed by polymerisation of nucleotides.
(b) The backbone of a DNA strand is built up of deoxyribose and phosphoric acid groups.
(c) The two DNA chains are identical.
(d) RNA is Fuelgen positive.
5. The double stranded DNA has 15% of cytosine. The percentage of adenine in DNA will be: Answer:__________
(a) 35% (b) 30% (c) 45% (d) 70%.
6. A phosphoglyceride is always made up of : Answer:__________
(a) a saturated or unsaturated fatty acid esterified to a glycerol molecule to which a phosphate group is also attached
(b) a saturated or unsaturated fatty acid esterified to a phosphate group which is also attached to a glycerol molecule
(c) only a saturated fatty acid esterified to a glycerol molecule to which a phosphate group is also attached
(d) only an unsaturated fatty acid esterified to a glycerol molecule to which a phosphate group is also attached.
7. In India, we find mangoes with different flavours, colours, fibre content, sugar content and even shelf-life. The large variation is on account of: Answer:__________
(a) species diversity (b) induced mutations
(c) genetic diversity (d) hybridisation.
8. Select the correct chronological order of the evolution of man.
Answer:__________
(a) Australopithecus → Homo erectus → Homo habilis→sapiens
(b) Australopithecus →Homo habilis→ Homo erectus →sapiens
(c) sapiens → Australopithecus → Homo erectus → Homo habilis
(d) sapiens → Australopithecus → Homo habilis → Homo erectus
9. Essential Amino Acids.
10.Describe the mechanism of inheritance of ABO blood groups in humans.