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Q1. Two main cell groups make up the nervous system- neurons and connective tissue cells such as astrocytes and schwann cells. Which are "nervous" cells? Why? What are the major functions of the other cell group?
Q2. The human gametes have about 3 billion bp of DNA in their chromosomes.
a. state the size of the diploid genome in kb (kilo bases; 1kb = 1000bp)
b. If the entire DNA was in relaxed B-DNA form, what would be the average length of a chromosome expressed in cm?
c. On average, how many complete turns would be in each chromosome?
d. If there are around 30-40,000 genes in a human gamete, how numerous genes are there in an average chromosome?
A repeating polymer with the sequence 5'- GUAGUAGUAGUA...-3' was found to produce only two types of polypeptides in a translation system that uses cellular componants but not living cells. Onle polypeptide consisted of repeating Val and the other ..
A researcher has come up with 5 hypotheses - based on what you know about the key milestones of life which do you think is most likely to be true?
List the three different structures for locomotion found among protozoans, and name an organism taht utilizes each structure.
Assume your text provides an interesting explanation for the "dormitory effect", in which women living or sometimes working together tend to synchronize their menstrual cycles.
A section of the E. coli genome that encodes the pheM protein. Write out and label: the reverse complement, the mRNA sequence.
Design an experiment or series of experiments to support or refute this hypothesis: A diet that is high in salt is associated with hypertension (high blood pressure), but hypertension is more common in people with a family history of the condition..
name a mechanism for an ion channel protein that can be selective for K+ and not Na+ (although the ionic radius of Na+ is smaller than that of K+)? What would be one possible mechanism for the opposite selectivity?
The standard Gibbs energies of formation of gaseous cis- and trans-2-butene are 67.15 kJ mol^-1 and 64.10 kJ mol^-1, respectively.
Give 2 distinguishing characteristics of a tRNA molecule. In translation what does the ribosome do? With reference to translation, what does translocation refer to?
Prepare an essay on Biotechnology using recent articles either in print or web-based. I have to write a one-page essay. Please provide as much detail
q. a mans grandfather has galactosemia a rare autosomal recessive disease. the man married with a woman whose sister
Discuss how does Newton's force of gravitational attraction between two water molecules compare to van der waals attractive force?
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