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How frequently in the DNA (i.e., every how many base pairs) would you find the following restriction enzyme sequences in the DNA of an organism? Assume random and equal distribution of nucleotides and a 50:50 ratio of AT:GC.
1. Hpa II 5'-CCGG-3'2. Nae I 5'-GCCGGC-3'3. Fse I 5'-GGCCGGCC-3'
find out in the way that RAS activity responds to extra-cellular signals? Why.
In a population of cattle, the following color distribution was noted: 81% red (RR), 18% roan (Rr), and 1% (rr). Is this population in a Hardy-Weinberg equilibrium? What will be the distribution of genotypes in the next generation if the Hardy-Wei..
Show diagramatically the effects of inbreeding (assume each genotype only mates with itself) on the allele frequencies of two alleles of the same gene over 3 generations. The starting genotype frequencies are AA=0.25, Aa=0.5, and aa=0.25. Summariz..
Barbiturates cause hypoventilation that is the slower-thannormal rate of breathing, since they suppress the respiratory centers in the brain. What happens to the red blood count of a habitual user of barbiturates? Explain in details.
A subject extends his arm palm up to catch a falling object. The contact of object with the hand triggers a reflexive response in the biceps muscle. But this response is different and opposite if the object is a raw egg instead of a ball. Explain why..
The OD of an E.coli culture is 0.23. You transfer 300 µl of this culture into 29.7ml of medium. You continue this same dilution one more time. You transfer 50 µl of your last dilution onto an LA plate. After 24 hours of incubation, you observe 11 ..
We now understand that mutations that cause the inhibition of apoptosis are found in tumors. Because proliferation itself is not induced by the inhibition of apoptosis, explain how this inhibition might contribute to tumor formation.
Which of the following statements is true about bacterial transformation? why?
Carlo is a microbiologist who detected viral genes integrated into bacteria and found that the viral genes were reproduced each time a bacterium divided. What kind of infection is he witnessing?
What is nondisjunction? In what type of reproductive cells in this most likely to happen? Name three chromosomal aberrations which can result fro this phenomenon.
For a microbiology experiment, you require a bacterial culture of 5.4 × 106 cells/ml. You think your suspension is at the right concentration,
During hemorrhagic shock in which blood pressure is decreased, which of the regulatory mechanisms is most important is increasing cardiac output to help maintain blood pressure?
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