Questions
how can a virus encode a protein larger than the size of its genome?

how can a virus encode a protein larger than the size of its genome?

In: Biology

An acute viral disease infects a population of chipmunks, and only those homozygous for allele b...

An acute viral disease infects a population of chipmunks, and only those homozygous for allele b are resistant. (Those individuals heterozygous or homozygous for allele B are susceptible and suffer 100% mortality).

A. If the initial frequency of allele b=0.2, what is the frequency (ignoring mutation) one generation after the introduction of this disease?

B. What is the mechanism of evolutionary change in this example?

In: Biology

Question 1: Name three actual species by scientific name and classify then according to species, genus,...

Question 1:

Name three actual species by scientific name and classify then according to species, genus, family, order, class, phylum, kingdom, and domain. At what point do your organisms share a common ancestor? Which pair of species is more closely related to each other than to the third species?

In: Biology

Answer the questions below regarding the Histology: 1. Key characteristics of epithelial tissues 2. what simple...

Answer the questions below regarding the Histology:
1. Key characteristics of epithelial tissues
2. what simple refers to? stratified refers to? Preustratified refers to? squamous and cuboidal cells refers to?
3. Explain how many layers, shape of cells, in which organ can be found,what is the function of each tissue of Simple Squamous epithelium, simple cubodial epithelium, simple columnar epithelium, stratified squamous epithelium, pseudostratified columnar epihelium, transitional epithelium.
4. Explain the exocrine and endocrine gland in pancreas. a.Locate the islets of langerhans(secret hormones) in endocrine gland. explain its function a bit.
b. Locate the acinar portion in exocrine gland. Explain a bit its function.

You can post some images for or draw for illustration of each too. but dont skip any part please.
thank you.



In: Biology

What is product feedback inhibition? Explain how product feedback inhibition happens in Lac operon.

What is product feedback inhibition? Explain how product feedback inhibition happens in Lac operon.

In: Biology

Write a short paragraph describing the drawbacks to maintaining DNA databases such as CODIS as tools...

Write a short paragraph describing the drawbacks to maintaining DNA databases such as CODIS as tools to solve crimes (Original).

In: Biology

Provide some examples on the enormous diversity seen in the Molluscs . Discuss body types and...

Provide some examples on the enormous diversity seen in the Molluscs . Discuss body types and give examples of some species.

In: Biology

You have an Hfr strain of E. coli that contains wild-type genes for maltose catabolism and...

You have an Hfr strain of E. coli that contains wild-type genes for maltose catabolism and alanine biosynthesis. You want to transfer these two genes into an F- strain that cannot use maltose and is auxotrophic for alanine, by conjugation. Your Hfr strain also has a tetracycline resistance gene located distal to the origin of transfer. You have a P1 phage suspension and any ONE strain of E. coli given in the MBIO 2020 lab manual at your disposal. Outline briefly how you would use these materials to carry out a successful conjugation and transfer the two genes of interest. You do not need to include experimental details, but you should give a medium that could be used to select for the successful recombinants after each gene transfer that you use. In the box below, briefly answer the following questions:

Why can’t you just conjugate the two strains as they are? (ie. why do you even need the P1 phage to carry out this experiment?)

What ONE additional E. coli strain from the lab manual would you use?

Outline a brief plan to transfer the mal and ala genes from the Hfr strain to the F- strain. Do not include experimental details (reagents, incubation times, number of test tubes, etc). DO INCLUDE an appropriate selection step for every gene transfer experiment that you use.

In: Biology

what effect would DNP have on ATP production? if added to culture media, which of the...

what effect would DNP have on ATP production? if added to culture media, which of the following do you predict would happen? please explain.

1) obligate aerobes would be able to grow but slower than before.

2) obligate anaerobes would not be able to grow.

3) facultative anaerobes would be able to grow but slower than before.

4) Aerotolerant anaerobes would not be able to grow

In: Biology

what does the endosymbiotic theory explain? Give 3 pieces of evidence that supports the endosymbiotic theory

what does the endosymbiotic theory explain? Give 3 pieces of evidence that supports the endosymbiotic theory

In: Biology

1.The TCA cycle in a particular tissue has been inhibited by fluoroacetate. However, it is not...

1.The TCA cycle in a particular tissue has been inhibited by fluoroacetate. However, it is not the fluoroacetate that is responsible for the inhibition. It gets converted to another molecule that enters the TCA cycle and is transformed into the inhibitor.

a) Propose the inhibitor molecule and mechanistically show the conversion of fluoroacetate to the inhibitor.

b) Indicate at what step fluoroacetate ultimately inhibits the TCA cycle.

c) Explain why you think fluoroacetate acts as an inhibitor of this enzyme? Your answer should include some sort of mechanistic explanation.

d) What difference in the concentration of each TCA cycle metabolite would you expect, compared with a normal uninhibited tissue? List each metabolite and indicate the effect on its concentration.

In: Biology

please answer all Which of the following statements is false? A. Ciprofloxacin inhibits DNA synthesis B....

please answer all

Which of the following statements is false?

A.

Ciprofloxacin inhibits DNA synthesis

B.

Acyclovir inhibits viral DNA synthesis

C.

Artemisinin would be a treatment for Malaria

D.

Niclosamide would be used to treat fungal infections

2)

Which of the following is an anti-HIV drug?

A.

Amphotericin B

B.

Chloroquine

C.

Metronidazole

D.

Indinavir

E.

None of the above

3)

Amphotericin B blocks mycolic acid synthesis and would be effective against Mycobacteria.

True

False

4)

Streptomycin effect bacteria by blocking ribosomes ability to produce proteins.

True

False

In: Biology

Biomaterial Interface Question List and briefly describe 5 design features you could incorporate in the design...

Biomaterial Interface Question

List and briefly describe 5 design features you could incorporate in the design of a blood contacting biomaterial.

Select a tissue you would like to interface with. Based on the physiology of this tissue, what design features might your incorporate in this biomaterial? Be tissue specific in your design.

In: Biology

You are performing a three-point test cross in order to map the order and distance between...

You are performing a three-point test cross in order to map the order and distance between three genes, designated X, Y, and Z, and you obtain the following results:

Phenotypes      Number Observed

+ Y +                          1

+ + Z                          72

X + Z                           2

X Y +                           70

X + +                          3

+ Y Z                         2

X Y Z                           0

+ + +                          0

Which gene is in the middle?

a) X

b) Y

c) Z

d) There is not enough data to make this determination.

Which is the coefficient of coincidence for this data set?

a) 0

b) 1

c) 8

d) 0.5

e) There is not enough data to make this determination.

In: Biology

The life cycle of flowering plants exhibits the same alternation of generations seen in lower plants...

The life cycle of flowering plants exhibits the same alternation of generations seen in lower plants (n gametophyteà2n sporophyte; where 2n = diploid number of chromosomes of the species). How does this life cycle compare with that of higher animals?

In: Biology