Provide an example of a simple/basal nervous system and a complex/derived nervous system. Explain how their functions differ.
In: Biology
30 ) Which of the following statements about the Lac operon is false?
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A. |
The Lac operon only produces RNA when lactose is present and glucose is absent. |
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B. |
The CAP activator can only bind DNA when it is bound to cAMP. |
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C. |
The Lac repressor binds to the operator DNA when lactose is not present in the cell. |
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D. |
As soon as the CAP activator is bound to DNA, the Lac operon will be transcribed. |
40 Which of the following statements about the cytoskeleton is false?
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A. |
The cytoskeleton is important for cell division and DNA segregation. |
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B. |
The cytoskeleton is made up of three types of protein filament. |
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C. |
The polymerization of protein monomers leads to the formation of cytoskeletal filaments. |
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D. |
The intermediate filaments of the nuclear lamina are present in both plant and animal cells |
Help please both of them thanks
In: Biology
You cross true breeding blue and red morning glories and get all blue offspring.
a) Based on this information alone:
i) How many loci are involved in the expression of this trait? How many alleles? What are the dominant and recessive interactions between the alleles at the locus/loci?
ii)what are the possible genotypes of the parents and F1s?
iii) Based on your hypothesized genotypes from ii, what do you expect the outcome of a cross between the F1's to be? (i.e. what phenotypes in what ratios?)
b) You then cross the F1 individuals and you obtain the following results
Blue - 200
purple - 126
red - 24
i) Are these results statistically consistent with your hypothesis above? (prove it!)
ii) If not, what is an alternative hypothesis that might explain these results? Are these results the result of one locus or 2? Test your new hypothesis using chi-squared test. Discuss the meaning of your results. (Note: If your hypothesis proves wrong, that is OK!!! But you have to be able to discuss why you think it's wrong.)
In: Biology
Explain the process of fermentation that takes place in eukaryotic cells, such as muscle cells.
Why are the products of fermentation necessary for anaerobic respiration to continue?
In: Biology
Compare and contrast classical and serological identification of bacterial, viral, fungal and parasitic human pathogens
In: Biology
When GLP-1 is released to the plasma, what are the target cells? What receptor does it bind to? Which intracellular signalling pathway is activated?
In: Biology
1) Explain the different types of ion channels.
2) Explain in detail the glucose symporter. How does it work and what is its mechanism?
In: Biology
Which of the following descriptions related to hormonally active agents (HAAs) is correct?
| a. |
HAAs are forms of pollution in environmental systems that mostly come from humans' excretion of hormones into the water |
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| b. |
HAAs definitely lead to cancer from the mutations that occur from exposure |
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| c. |
HAAs primary hazard is biomagnification within food webs |
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| d. |
HAAs interact with an organism and the mechanisms for regulating growth and development by disrupting normal growth functions. |
Blood borne pathogens found in contaminated blood are an example of a ___________hazard.
| a. |
physical |
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| b. |
chemical |
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| c. |
radiological |
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| d. |
biological |
If a specific animal species has a population of 4 million and the population is reduced to only 2000, this is an example of a likely overall reduction in the ____________diversity.
| a. |
genetic |
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| b. |
species |
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| c. |
habitat |
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| d. |
population |
In: Biology
In: Biology
In your own words, compare and contrast Gleasonian vs. Clementsian community Ecology. Your book only discusses Gleason, but there is PLENTY online about the debate. Provide examples that support each (top points for finding examples NOT included in our book or ppts. What is the consensus as to which seems to best describe most communities?
In: Biology
(BioChem) Acyl-CoA dehydrogenase deficiencies are diseases related to the impaired ability to oxidize fatty acids via beta oxidation. Symptoms of these acyl-CoA dehydrogenase deficiencies include hypoketosis [low blood levels of ketone bodies], hypoglycemia [low blood glucose], and hyperammonemia [increased blood levels of ammonia] during long periods of fasting. (Please type response, thanks!)
a.) In what 2 ways is beta oxidation important during prolonged periods of fasting?
b.) Please explain why patients with acyl-coA dehydrogenase deficiencies have bouts of hypoketosis [1- 2 sentences is sufficient].
c.) Please explain why patients with acyl-coA dehydrogenase deficiencies have bouts of hypogycemia [1- 2 sentences is sufficient].
d.) Please explain why patients with acyl-coA dehydrogenase deficiencies have bouts of hyperammonemia [1- 2 sentences is sufficient].
In: Biology
DNA polymerase III builds new DNA strands in the 5' to 3' direction...always adding the new nucleotide to the 3' end of the existing strand. As it adds new nucleotides, it proofreads its work. If a mistake is detected, DNA polymerase will act as an exonuclease and excise the incorrect nucleotide. A. What supplies the energy needed to add the new nucleotide to the existing chain? B. Please explain why evolution has favored 5’ to 3’ polymerases, as opposed to 3’ to 5’ ones (hint...what happens if DNA Polymerase removes a nucleotide?).
In: Biology
1. Explain two ways bacteria might interact in a community, and why that interaction might happen that way.
2. Explain in detail one way that bacteria can share genetic information with each other, but not through vertical transmission.
In: Biology
Describe the effect of dust mites on humans and explain how to control them.
In: Biology
What is the significance of Haemaphysalis longicornis?.
In: Biology