Ich2106:Biochemistry I Question Paper
Ich2106:Biochemistry I
Course:Bachelor Of Science In Public Health
Institution: Meru University Of Science And Technology question papers
Exam Year:2013
QUESTION ONE (30 MARKS)
a) State Mendel’s second law of inheritance. b) i) Haemophilia is agenetic disease caused by a recessive gene located in X- chromosome. Using appropriate symbols work out the phenotypic ratio of the offsprings from a couple where the man is haemophiliac and the woman is phonotypically normal but a carrier. (5 Marks) ii) Explain why haemophilia is more common in males than females. (3 Marks) c) State four rules used in binomial nomenclature. (4 Marks) d) A group of students found a flower with a floral formula as Ca5Co5A10G1. Assuming that the floral formula is correct. With a reason in each case suggest the division and class of the plant. (4 Marks) e) State the function of each of the following organelles. (3 Marks) i. nucleolus ii. lysosomes iii. mitochondria f) Explain how a seed is formed in a flowering plant. (4 Marks) g) Explain the difference between growth and development in plants. (2 Marks) h) Outline the characteristics of imbibition process. ( 3 Marks)
QUESTION TWO (20 MARKS)
Describe double fertilization in flowering plants. (20 Marks)
2
QUESTION THREE (20 MARKS)
a) Name the seven main taxonomic units used in classifying maize plant, starting with the smallest unit to the largest. (7 Marks) b) Name the three main divisions of the Plantae kingdom and describe the general characteristics of each. (13 Marks)
QUESTION FOUR (20 MARKS)
Discuss how Nitrogen is made available to plants under the following headlines
a) Biologic processes b) Non-biologic processes. (20 Marks)
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