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The trp (tryptophan) operon which is shown in the figure will have five structural genes encoding enzymes for tryptophan biosynthesis with an upstream Ptrp (trp promoter) and Otrp (trp operator series). The trp operator region in part overlaps the trp promoter. The operon is regulated like that transcription happens when tryptophan in the cell is in short supply.
Entomophily - Cross-pollination It involves insects to carry the pollen to achieve pollination. Salvia exhibits a specialised 'tumapipe' floral mechanism that signifies classi
What are the lateral lines of fishes? The lateral lines of bony fishes are sense organs that extend along both sides of the animal body. They make contact with the environment
Describe Lifetime Risk Estimation ? Traditional statistical and epidemiological methods of estimating long-term risks do not accurately reflect population burden of disease. Th
Which of the following processes help bring oxygen to the body cells that are in a leg? A. Net flux of oxygen from red blood cells into blood plasma in the body capillaries in
A proton accelerates from rest in a uniform electric field of 650 N/C. At some later time, its speed is 1.3 106 m/s. (a) Find the magnitude of the acceleration of the proton. m/s2
What are the structures that form the external ear? What is its function? The internal ear comprises the pinna, or auricle, and the auditory canal. Its function is to conduct t
Biological catalysts à speed up chemical reactions in the body without being consumed in the process Reduce the activation energy needed for reactants to reach the transit
Define Body Mass Index (BMI) or Quetelet Index? BMI is an index measure of body fat used for the assessment of disease risk. It is a figure which gives an indication of weight
Define Impediments to infuse biology - Lack of trained people? At present, biologists as a rule have not been trained sufficiently in quantitative approaches. A heavy dose of m
An mRNA molecule codifies only one type of protein? Eukaryotic cells have monocistronic mRNA, i.e., every mRNA codifies only one polypeptide chain. Prokaryotes can present poly
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