Questions
How would you describe the differences in appearance between a phase contrast image and a DIC...

How would you describe the differences in appearance between a phase contrast image and a DIC image of a cheek cell?

In: Biology

Suppose a bacterium had the opportunity to form a glycocalyx, a flagellum, a pilus, or a...

Suppose a bacterium had the opportunity to form a glycocalyx, a flagellum, a pilus, or a spore. Which do you think it might choose? Why?

Explain in 1-2 paragraphs

In: Biology

​​​​​​Explain how communicating the cardiovascular system to a patient is different from how you would explain...

​​​​​​Explain how communicating the cardiovascular system to a patient is different from how you would explain the same system to a medical colleague.

In: Biology

Discuss the role of economics in the debate regarding the way we should interact with the...

Discuss the role of economics in the debate regarding the way we should interact with the environment. Your answer should demonstrate a clear understanding of the issues presented in the text. Be as clear and detailed as you can.

In: Biology

Calculate the Nernst potential for each ion, the membrane potential, and driving force for each of...

Calculate the Nernst potential for each ion, the membrane potential, and driving force for each of

the following examples:

Intracellular ions: [Na+]= 12 mM, [K+]=145 mM, [Cl-]=15 mM, [Ca2+]=250 nM

Extracellular ion: [Na+]= 150 mM, [K+]=2.9 mM, [Cl-]=150 mM, [Ca2+]=7 mM

In: Biology

Fill in the blanks in the table below: Monomer Polymer Name examples of some polymers of...

  1. Fill in the blanks in the table below:

Monomer

Polymer

Name examples of some polymers of this type

Nucleic acid

RNA

___________

      Amino acids

Enzymes

_____________

Starch

Cellulose

  1. Highlight the correct answer for each pair: Which is bigger, a monomer or a polymer? an amino acid or a protein? a monosaccharide or a polysaccharide? a nucleotide or DNA?
  2. Fill in the blanks: Condensation reactions ______________ (make or break?) polymers by __________ (adding or removing?) water.
  3. Name an example of a polysaccharide. What is the name of the monomer that comprises this polysaccharide?
  4. What is the function of the polysaccharide you named in #4? Where is it found (animals or plants)?

In: Biology

List the factors that influence a child’s development of a secure attachment. Pick two of them...

List the factors that influence a child’s development of a secure attachment. Pick two of them and explain how they impact development of secure attachment.

In: Biology

How does translation begin in a prokaryote?  Eukaryote?  How does the protein chain get made?  How does termination occur?

How does translation begin in a prokaryote?  Eukaryote?  How does the protein chain get made?  How does termination occur?

In: Biology

1. Which of the following statements is attributable to Georges Cuvier? Select one: a. If an...

1. Which of the following statements is attributable to Georges Cuvier?

Select one:

a. If an organ is used it strengthens and grows; if it isn’t used it weakens and shrinks

b. Slow subtle processes, acting over long periods of time, can have a dramatic effect

c. Fossils in older sedimentary rock strata bear less resemblance to modern organisms than those from recent strata

d. Geological processes operating today are the same as those that have operated in the past

2. In science, a theory is an idea that

Select one:

a. is a speculation supported by a rational argument.

b. has been extensively tested and supported by experiments and observations.

c. is also known as a hypothesis.

d. is consistent with general observations but hasn't been directly tested.

In: Biology

What is the chief source of the difference in the conversion of energy into useful work...

What is the chief source of the difference in the conversion of energy into useful work of the cell (efficiency) between a cell’s oxidation of glucose (~40%), compared to oxidation of glucose by combustion in air (0%)?

In: Biology

Briefly explain what, if any, aspects of Mayr's 5 theories of evolution are challenged by each...

Briefly explain what, if any, aspects of Mayr's 5 theories of evolution are challenged by each of the following concepts: (a) Newman and Müller’s epigenetic mechanisms of character origination in which genetic evolution has more of a consolidating that innovating role, (b) genetic assimilation of an environmentally induced phenotype, (c) character variability as contrasted with character variation, (d) heterotopy, (e) heterochrony by neoteny, (f) homology thinking.

In: Biology

What is the Evolutionary Algorithm? (state it in one simple sentence). What are the three required...

What is the Evolutionary Algorithm? (state it in one simple sentence). What are the three required components of any evolutionary system?

In: Biology

OK. So, this week we’re investigating the prokaryotic gene PPtrl, which codes for the Rbbl protein....

OK. So, this week we’re investigating the prokaryotic gene PPtrl, which codes for the Rbbl protein. You painstakingly derived a segment of the transcribed sequence of this gene, which is listed below.

a) What would be the mRNA sequence that corresponds with this segment?

coding

5’

G

C

T

T

A

G

C

T

G

G

A

C

T

3’

template

3’

C

G

A

A

T

C

G

A

C

C

T

G

A

5’

b) OK. So, knowing what you do about this particular PPtrl gene, describe how the process of transcription initiation would go for this gene.

In: Biology

What is the benefit of a binomial naming system? How does our understanding of the relationships...

What is the benefit of a binomial naming system? How does our understanding of the relationships among organisms in the natural world benefit from using the Linnaean system? Why do all mammals share similar skeletal structures? ( I will give 5 stars) and don't plagiarize

In: Biology

Explain why the enzyme carbonyl phosphate synthetase can be considered the most important enzyme in the...

Explain why the enzyme carbonyl phosphate synthetase can be considered the most important enzyme in the to the urea cycle?

In: Biology