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1. A. List three ways in which transcription differs from translation in protein synthesis.
B. Name the structures labelled A to C. ( 3m)
A
B.
c.
C. Describe two structural features which adapt tRNA to its role in translation.
2. A. Describe the main feature of replication of DNA.
B. DNA is a very important molecule in living organisms as it carries the genetic code.
Before a cell divides, the DNA molecule replicates so that each resulting daughter cell is genetically identical to the original parent cell.
(a) Explain the nature of the genetic code.
3. Explain, using a named example ( cystic fibrosis ) how gene mutation may affect the phenotype of an organism.
Pine, fir, spruce, cedar, larch and cypress are the famous timber-yielding plants of which several also occur widely in the hilly regions of India. All these belong to
why do scientists measure carbon dioxide levels from a mountain on top of the big island of hawaii ?
Phenylketonuria, PKU, is a neurodegenerative disorder resulting from inability to metabolize phenylalanine. PKU is inherited as autosomal recessive trait.
You just harvested either a BM or PB sample and found very few metaphases under the phase-contrast microscope. What might be the possible reason in terms of specimen handling, culture setup, harvesting, and slide preparation?
What effect would a drug that either dramatically reduced or enhanced the fidelity of a viral RNA polymerase have on the survival and fitness of a virus in a population? Explain Why? Are there currently examples of such drugs? How do they work?
Integrase:
Which of the following statements about the human brain is true.
Currently, three fossil skulls of Homo sapiens, dating to about 160,000 years BP, were discovered in eastern Africa. These skulls fill a gap between the 100,000 year old H. sapiens.
The genes dumpy wings, clot eyes, and apterous wings are linked on chromosome II of Drosophila. In a series of two-point mapping crosses, the genetic distances demonstrate below were determined.
Which of the following types of data support the theory of natural selection?
q1. the basic structural unit of a biomembrane is the phospholipid bilayer. acetic acid and ethanol are each collected
before building a new power plant a utility company must gain permission and procure the required permits for
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