Question 29 (1 point) Concerning enveloped viruses. the viral genome codes for all the proteins presnt the peplos. Question 29 options: A) True B) False

Question 30 (1 point) Retroviruses, such as HIV viruses, must carry (bring) a ________ enzyme in order to be able to replicate. . Question 30 options: A) DNA-dependent RNA plymerase (transcriptase) enzyme B) RNA-dependent RNA plymerase (transcriptase) enzyme C) RNA-dependent DNA plymerase (reverse transcriptase) enzyme D) DNA-dependent DNA plymerase (replicase) enzyme E) DNA-dependent RNA plymerase (transcriptase) enzyme

Question 31 (1 point) The influenza viruses posess segmented ssRNA, an envelope, and a helical nucleocapsid. Question 31 options: True False

Question 32 (1 point) The shape and size of a virus are a function of its nucleoproyein. Question 32 options: A) True B) False

Properties of Enzymes

1. The concentration of an enzyme within a cell is extremely low relative to other material present, yet functions effectively in its metabolic role. How can an enzyme function and never seem to run out?

2.Name 4 factors which affect the activity of an enzyme.

3. A chemist found that a reaction did not take place under any set of conditions. If the chemist added a catalyst, would the reaction then occur? Explain your answer.

4.The rate of an enzyme-catalyzed reaction usually increases with temperature, but then decreases after reaching the “optimal temperature”. Why does this take place?

5.Why does saliva hydrolyze starch in the mouth but not in the stomach?

6.For a given enzyme-catalyzed reaction, on a molar basis, substrate concentration increases from two to four times the enzyme concentration (double). Would the rate of the reaction also double? Explain your answer.

Small areas that have a large number of endangered and threatened species are referred to as ______.

Select one:

a. biodiverse environments

b. biologically magnified

c. endemic environments

d. biodiversity hot spots

2.

The primary goal of conservation biology is to ______.

Select one:

a. integrate human culture back into nature

b. maximize the land set aside for wildlife

c. counter the loss of biodiversity

d. catalog species

3.

Organisms that consume producers are ______.

Select one:

a. detritivores

b. producers

c. decomposers

d. primary consumers

4.

Most decomposers are _____.

Select one:

a. fungi and prokaryotes

b. animals

c. plants and fungi

d. bacteria and plants

5.

Plants can utilize the ______ form of nitrogen.

Select one:

a. N₂

b. nitrate

c. thiol

d. amino

1, Describe the mutation in the DNA molecule that leads to sickle cell disease. (What change is there in the DNA?)
2. How did this mutation affect the amino acid sequence in the hemoglobin protein? (Which amino acid was different?)
3. What was the effect on the actual hemoglobin protein caused by this amino acid change?
4. How do the changes in the red blood cells relate to the symptoms

consider the conversion of glucose to lactate by glycolysis. Determine number of ATP, NADH, and FADH2 produced by this rxn sequence.

What is the efficiency of energy retention for glycolysis if cleavage of a typical carbon carbon bond releases 339kJ/mol.  

Which of these is NOT a true statement? (Why is the answer B?)

a. All Lewis bases are also Brønsted-Lowry bases.

b. All Lewis acids contain hydrogen.

c. All Brønsted-Lowry acids contain hydrogen.

e. All Lewis acids are electron deficient.

f. According to the Brønsted-Lowry theory, water is both an acid and a base.