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Sbt2103:Cellular Basis Of Life Question Paper

Sbt2103:Cellular Basis Of Life

Course:Bachelor Of Crop Protection

Institution: Meru University Of Science And Technology question papers

Exam Year:2012

QUESTION ONE (30 MARKS)
a. Explain the cell theory. (4 Marks) b. Distinguish between the terms cytoplasm and karyoplasms. (2 marks) c. Briefly explain the role of carbohydrates as a chemical component of a cell. (4 Marks) d. State four functions of Eucaryotic cell wall. (4 Marks) e. Name each stage of mitosis described below; i. Chromosomes line up the equatorial plane. ii. Nuclear membrane reforms and cytokinesis occurs. iii. Chromosomes become visible, spindle apparatus forms. iv. Sister chromatids move to opposite poles of the cell. (4 Marks) f. List ten differences between mitosis and meiosis. (10 Marks) g. What is the significance of the reproductive cycle? (2 Marks)
QUESTION TWO (20 MARKS)
a. One of the DNA strands has the following base sequence. 5’---TCC GAA TAC CTC --3’ what is the base sequence in; i. The completary DNA strand ii. The mRNA. (4 Marks) b. State two similarities and six differences between RNA and DNA. (16 Marks)
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QUESTION THREE (20 MARKS)
a. Explain the significance of i. Mitosis ii. Meiosis (10Marks) b. Define the following terms i. Pagenesis ii. Epigenesis iii. Dyad iv. Synapsis v. Univalent (10 Marks)
QUESTION FOUR (20 MARKS)
a. State the functions of the following organelles in a cell. i. Endoplasmic Reticulum ii. Golgi complex iii. Lysosomes iv. Nucleus (10 Marks) b. Explain the spontaneous generation theory of life giving specific examples.(10 Marks)
QUESTION FIVE (20 MARKS)
Mitochondria is involved in metabolic functions discretely assigned to its various components/compartments.
c. Draw the structure of a mitochondrion and label all the components. (10 Marks) d. For each of the components of the mitochondrion list the enzymes/metabolic activities that take place. (10 Marks)

Sbt2103:Cellular Basis Of Life Question Paper

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