Questions
What cellular features are retained if the plant cell is alive?

What cellular features are retained if the plant cell is alive?

In: Biology

How would an ecosystem be affected if a new tertiary consumer were brought into the ecosystem?...

How would an ecosystem be affected if a new tertiary consumer were brought into the ecosystem? Be specific and include details about how each trophic level would be impacted.  

In: Biology

pick  5 Chemistryanalytes (Example: Troponin) and describe the following for each analyte: 1. Normal range 2. Units in which analyte is reported...

pick  5 Chemistryanalytes (Example: Troponin) and describe the following for each analyte:
1. Normal range
2. Units in which analyte is reported
3. Disease caused by increased or decreased value
4. Does Hemolysis affect the test result?
5. What color tube is required for the analyte testing

In: Biology

What is meant by an emergent property of a population of ants? That is, what structure...

What is meant by an emergent property of a population of ants? That is, what structure do we observe at the population level that is not apparent at the individual level?

In: Biology

Non-homologous end joining (NHEJ) and Homologous recombination repair (HRR) are important DNA repair mechanisms in the...

Non-homologous end joining (NHEJ) and Homologous recombination repair (HRR) are important DNA repair mechanisms in the mammals. With diagrams, explain how the repairs are carried out in NHEJ and HRR. Are they completely independent pathways? Justify your answer with specific examples.

In: Biology

List conditions of site-specific recombination that result in integration, excision, and inversion respectively, in terms of...

List conditions of site-specific recombination that result in integration, excision, and inversion respectively, in terms of the shapes of DNA and orientations of the target site.

In: Biology

What is the quasilinear viscoelastic (QLV) theory and why is it applicable to understand the material...

What is the quasilinear viscoelastic (QLV) theory and why is it applicable to understand the material behaviour of tendons and ligaments?

In: Biology

West Nile virus is capable of infecting many different organisms (humans, birds, raccoons, and so on)....

West Nile virus is capable of infecting many different organisms (humans, birds, raccoons, and so on). This information indicates that West Nile virus

a.

is capable of fecal-oral transmission.

b.

has a narrow host range.

c.

has a narrow tissue tropism.

d.

has a broad host range.

In: Biology

1)Which of the following is (are) required for evolution? A) highly stable genome B) competition C)...

1)Which of the following is (are) required for evolution?

A) highly stable genome

B) competition

C) heritable traits

2) The National Toxicology Program reported in 2016 that cell phone radiation increased brain tumor growth in male rats. Radiation can cause damage and mutations to DNA.

Suppose you wished to study this further. You mate these rats and find that the offspring have normal incidence of tumors. You would conclude that the tumors were most likely due to______ .

A) changes to the stomatic cells

B) changes to the gonadal cells

C) changes to the cells

If on the other hand, the offspring also had increased tumor growth, then you would conclude that the_______ .

A) changes occur in the stem cells

B)changes occur in the germ cells

C) tumor tissue was transferred to the offspring

Cell phones emit________ radiation when talking than on standby.

A) more

B) less

That would suggest that using a hands-free headset may be beneficial in preventing brain tumors. Ironically, if the phone is kept in the pocket during a call using a headset, then the genetic changes would be_________ .

A) less severe

B) prevented

C) more likely to pass to the next generation

3) Which of the following point mutations would have little or no effect on cellular function?

A) mutation from AUA to AUG

B) mutation in exon

C) mutation from CUC to AUU

D) mutation from UUA to UUG

E)mutation in regulatory region

4) Why does gene duplication promote evolution?

A)duplicated genes are under less selective pressure

B)duplicated genes are less likely to mutate

C)duplicated genes do not promote evolution

5) Urokinase and chymotrypsin (a digestive enzyme) have one domain in common with each other. This suggests that:

A) they are part of a gene family

B) they evolved through exon shuffling

6) Match the term with the best definition:

Terms:                                                             Definitions:

Exon shuffling                                                 A)allows bacteria to become antibiotic resistant

Point mutation                                                 B)often has a neutral effect

Horizontal transfer                                           C)involves errors in replication of chromosome ends

                                                                        D) can only occur in eukaryotes

7) What can you conclude about genetic differences and similarities between humans, chimpanzees, and E. coli?

Most conserved genes: a) human accelerated genes b) polymerase c) ribosomal RNAs

Fairly conserved genes: a) human accelerated genes b) polymerase c) ribosomal RNAs

Least conserved genes: a) human accelerated genes b) polymerase c) ribosomal RNAs

In: Biology

Genetic deficiency in RAG-1 and genetic deficiency in TAP1 both lead to the same outcome: severe...

Genetic deficiency in RAG-1 and genetic deficiency in TAP1 both lead to the same outcome: severe combined immunodeficiency (SCID), in which a patient has an almost completely nonfunctional adaptive immune response and is unable to fight off infections with normally harmless microbial organisms. ​EXPLAIN WHY​ deficiency in these two very different genes has the same clinical outcome. How will RAG-1 deficiency affect the immune system? How will TAP1 deficiency affect the immune system? How are these outcomes similar, and how are they different? Why would they give rise to the same set of medical symptoms?

In: Biology

a) How was fertilisation achieved before the introduction of chemicals? Hence, How are furrows produced and...

a) How was fertilisation achieved before the introduction of chemicals? Hence, How are furrows produced and what effect do they have on agriculture?

b)What was the global impact of the Haber-Bosch process? Hence, if you can, please draw an Archimedes screw showing how it works and the direction of movement & flow.

thanks

In: Biology

Answer the following questions regarding ultimate and proximate reasons for animal behavior. In a social hierarchy...

Answer the following questions regarding ultimate and proximate reasons for animal behavior.

  1. In a social hierarchy of animals, individuals that are ‘low’ in the hierarchy do NOT appear to realize many of the benefits accorded the dominant individuals. Why? In other words, what ultimate reasons explain why submissive individuals ‘tolerate’ this situation? What proximate reasons explain why submissive individuals tend to remain submissive?
  2. In an agonistic encounter between two individuals of the same species, one of the individuals may find it 'fit to quit'. Why? In other words, what is the ultimate reason that explains this behavior? When may it be 'fit to quit'? In other words, what is (are) the proximate reason(s) which allow an individual to determine if would be 'fit to quit’?
  3. It is not uncommon to see “baby” birds (e.g., American Robins or European Starlings) as large as their parents (and capable of flight and feeding themselves) begging to be fed by their parents. The parents often respond aggressively towards their offspring. Why? In other words, what is (are) the ultimate reason(s) that explains the parents behavior?

In: Biology

tell us something unique about yourself. Most likely, your 'unique' trait requires ENERGY. How do you...

tell us something unique about yourself. Most likely, your 'unique' trait requires ENERGY. How do you think this is related to metabolic processes such as the Citric Acid cycle and Electron Transport chain?

In: Biology

Discuss the importance of risk management and quality assessment in preventing medical-legal issues or non-compliant activities....

Discuss the importance of risk management and quality assessment in preventing medical-legal issues or non-compliant activities. In this discussion, elaborate and/or describe Phase 3 of the Patient-Driven Payment Model. 200 words

In: Biology

3. Cell membranes contain a variety of integral and peripheral membrane proteins. a. Explain the differences...

3. Cell membranes contain a variety of integral and peripheral membrane proteins.

a. Explain the differences between symport, antiport and uniport proteins compared to ion channels.

b. There are a variety of glucose transport proteins in the cell membrane with some relying heavily on the sodium/potassium ATPase pump. (1) Explain this relationship and indicate how this is important to the translocation of glucose across the intestinal lumen into the blood. (2) CHALLENGE: Suggest an in vitro experiment that would allow you to test this relationship and determine in which direction the glucose is transported (e.g. apical to basal vs basal to apical). Hint: See Fig. 11-30 in your text and associated text.

c. CHALLENGE: You purify an integral membrane protein and perform a hydropathy plot. Analysis of this protein shows 7 substantial peaks in the 0 to + range. You presume that this profile suggests that you may be working with a GPCR. Explain the basis for your reasoning and explain how you might be able to test this hypothesis.

In: Biology