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If there are 20 amino acids commonly found in protiens, how many different dipeptides are there? How many different tripeptides? How many different trinucleotides(remember that nucleotides are the building blocks of DNA+RNA)?How many different single stranded RNA's are composed of 99 nucleotides?
Clostridium and Streptococcus are both catalase-negative. Streptococcus grows by fermentation. Why is Clostridium killed by oxygen, whereas Streptococcus is not.
Plan a scientific experiment to find out the effect of this environmental factor on the rate of photosynthesis or cellular respiration in your chosen organism (reviews the scientific method, remember hypothesis, control so on.
Transformation, conjugation, and transduction were discovered in the laboratory. How important are these mechanisms of genetic recombination in nature.how is electrophoresis used in criminal forensics.
Given the following facts, (a) tell in which direction reaction would tend to go if NAD^(+), NADH, pyruvate, and lactate were mixed, all at 1 M concentrations, in the presence of lactate dehydrogenase at pH 7; (b) calculate ΔG'° for this react..
Earlier in 2010, the Pacific island nation of Samoa decided to switch from driving on the right to driving on the left. Why may these cause difficulties? Why is it complicated for a cell to change codon usage, say, switching a "stop" codon to a trypt..
Assuming that genotype essential to produce flat tails is homozygous recessive (such as bb) compute the frequency of the b allele in the squirrel population to two decimal places.
Anatomical attributes that are reduced and functionless in organisms but related to functional organs in related organisms are termed. Vestigial. Homologous.
Explain the prevalence of the cervical cancer in 1999 and 2004? Specify how many women were at the risk of developing the cervical cancer before being screened in: 1999, and 2004.
Oceans receive materials from land primarily as runoff from rivers. Which of the statements is true regarding the materials and nutrients found in the oceans? Most elements that enter the oceans from other compartments remain suspended in the water.
The genotype of F1 individuals in a tetrahybrid cross is AaBbCcDd. Assume independent assortment of these four genes, what are the probabilities that F2 offspring will have the following genotypes.
Examine the major stages of sea urchin development with reference to your series of detailed drawings and observational notes. How did the embryonic cells compare in size with the original gamete cells? State reasons such a difference may exist.
Aspirin has a pH of three. Some people who take large amounts of aspirin (for example, for arthritis) take a pill that combines aspirin with Maalox. What is the reason for this combination.
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