Cell Biology (BIOS2101)
Geology, Mining and Environmental Science - GENV
Semester: First Semester
Level: 200
Year: 2012
UNIVERSITY OF BAMENDA
FACULTY OF SCIENCE
FIRST SEMESTER CONTINOUS ASSESEMENT FOR 2011/2012 SESSION
DEPARTMENT: Life Sciences COURSE INSTRUCTORS: Salah, Neba
COURSE CODE: BIO 201 COURSE TITLE: Cell Biology
DATE: 14/05/2012 TIME ALLOWED: 2 hours
DURATION: 9:00-11:00
Instructions: Answer all the two Questions
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(1) Membranes are important structural features of cells.
(a) Describe how membrane structure is related to the transport of materials across a membrane. (10Mks)
(b) Describe the role of membranes in the synthesis of ATP in cellular respiration and photosynthesis.
(10Mks)
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(2) A portion of a specific DNA molecule consists of the following sequence of nucleotide triplets:
TAC GAA CTT CGG TCC
This DNA sequence codes for the following short polypeptide:
Methionine-leucine-glutamic acid- proline-arginine
(a) Describe the steps in the synthesis of this polypeptide. (6Mks)
(b) what would be the effect of a deletion or an addition in one of the DNA nucleotides? (2Mks)
(b) what would be the effect of a substitution in one of the nucleotides? (2Mks)
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Total: 30 Marks
Good luck
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