Biology Answers

1.  As an environmental engineer, you will follow the scientific method and start your work by generating a hypothesis first.

Formulate a hypothesis on how bacterial cells use their characteristics to take up hydrocarbons from oil spills. Specify the mode of transport through the cell membrane (active vs. passive/endocytosis vs. exocytosis) and support your claim with scientific reasoning.

Describe how these bacterial cells would take up hydrocarbons if:

-     they only possessed a cell membrane and lacked the cell wall.

-     they possessed membrane-bound organelles such as vesicles.

Include in your answer the lipid bilayer, structural components of cell membranes and those of cell walls and discuss the selective permeability characteristic of membranes. 

When you were young you may have encountered some of your relatives telling you that you have the same eye color as that your mother or your nose has the same shape as that of your father. As you look closely to them you found out that you do not completely look a like. What do you think is the reason?

One reason for these differences is due to: just pick one and why?

A.) Crossing over

B.) Evolution

C.) Formation

D.) Mutation

1_write the two equations that represent the gas exchange between blood and air

2_Explain the change of blood color when passing through a pulmonary alveolus

3_name the blood components transporting the respiratory gases

4_Name the form by which these respiratory gases are transported

What can cells do to increase their Surface Area -to- Volume Ratio?

During your shift at the clinic, a young man arrives with a red, scaly rash formed into rings. What is this patient’s diagnosis likely to be? What causes this condition? How can he avoid this rash in the future?

How do transcription factors work? What is their relationship to control regions in DNA?

All cells in an organism contain the same genes, however, it contains different types of cells. How is this paradox of “genetic equivalence” resolved by the concept of “differential gene expression”?

Changing the shape of a protein is also known as a change in its ___________.

Answer choices

a) conformation

b) primary structure

c) nature

Changing the shape of a protein is also known as a change in its ___________.

Monty wants to engineer a super archaea which can survive and thrive in extremely hot and hypersaline water. What characteristics should she use to achieve the organism? Provide at least 3 and justify your answer