Hans Raj College ,
University of Delhi
Type of Announcement : Model Question Paper for B.sc Physical Science Semester - I
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Subject - Biology I Time - 3 Hrs Marks - 75

Note :
** Attempt Five questions in all.
** Question No. 1. is compulsory

1. (a) Define any four of the following
(i) pH
(ii) Autotrophs
(iii) Endemism
(iv) Ecosystem
(v) Gene
(vi)Amino acids.

(b) Write any one major contribution of any four of the following scientis
(i) Kary Mullis
(ii) G. Mendel
(iii) Linus Pauling
(iv) Rosalind Franklin
(v) Charles Darwin
(vi) T.H. Morgan.

(c) Write True or False
(i) Bacterial cell has a nucleus.
(ii) All organisms on your campus make up a community.
(iii) Cholesterol is a protein.

2. Write short notes on any three of the following
(a) Endosymbiotic theory
(b) Central dogma
(c) Model organisms
(d) Phospholipids
(e) Archaea.

3. (a) What are proteins ? Discuss their importance in biological systems.
(b) Describe the structure of DNA and discuss two important functions of nucleic acids.
Differentiate between any five of the following
(a) Homology and Analogy
(b) Covalent and Ionic bonds
(c) Codon and anticodon
(d) Era and Epoch
(e) Starch and Cellulose
(d) Prokaryotic and Eukaryotic cell

4. Explain the following
(a) Probe
(b) Phylogeny
(c) Gene flow
(d) Buffers
(e) Enantiomeres.

5. (a) Discuss any three important properties of water molecule which are important for existence of life on earth.
(b) Discuss Oparin-Haldane hypothesis. Describe the experimental proof for abiotic synthesis of macromolecules

6. (a) What is epistasis ? Describe the various epistatic gene interactions with examples.
(b) Discuss any three functional groups with examples.

See more questions download here : http://hansrajcollege.co.in/ZI_2011/LSPT%20101.pdf