1) How does our body control activation/ deactivation of some digestive enzymes?

Select one:

a. Changing the body temperature

b. pH

c. Changing the shape of the protein

d. feedback inhibition

e. None of the above

10. What is surfactant and why is it important?

11. What circulation is associated with the right side of the heart? The left?

12. What is hemoglobin?; what does it do?

13. Where in the body does hemoglobin pick up oxygen where does it release it

I marked the correct answers to these questions, but I just want to know how to solve them.

1) In a cross of AaBbCcDdEeFf X AaBbccDdEeFf, what proportion will have the ABCDeF phenotype?

A. 27/64

B. 27/128

C. 27/512

D. 81/512

E. 81/2048 ####

2.) In a cross of two flies +/vg Cy/+ +/se +/ab X +/vg +/+ se/se ab/ab what proportion of the offspring will be mutant in phenotype for all four markers?

A. 0

B. 3/64

C. 1/16

D. 1/32 ####

E. 1/64

3) A cross of two heterozygous individuals produces 74 dominants and 26 recessives. What is the chi-square value for these results?

A. 8/25

B. 16/75

C. 4/75 ####

D. 8/75

E. 12/25

4) Shell orientation in snails is due to a maternal effect gene. A true breeding sinistral (recessive) is crossed to a true breeding Dextral (dominant). The offspring from that cross are self-crossed. What will be the expected ratio of shell types?

A. All sinistral

B. All Dextral ####

C. Half sinistral, half Dextral

D. ¾ Dextral, ¼ sinistral

E. ¾ sinistral, ¼ Dextral

19) In peas, axial (A) flower position is dominant to terminal (a), tall (L) is dominant to short (l), and yellow (Y) is dominant to green (y). If a plant that is heterozygous for all three traits is allowed to self-fertilize, how many of the offspring would be dominant for all three traits?

A) 3/64

B) 9/64

C) 27/64 ####

D) 32/64

E) 64/64

20) The product H substance is needed to express the blood antigen. A mating of IA I B Hh X IA I B hh should produce what ratio of blood types?

a) 1/4 AB, 1/8 A, 1/8 B, 1/2 O ####

b) 3/8 AB, 3/16 A, 3/16 B, 1/4 O

c) 1/4 AB, 3/16 A, 3/16 B, 3/8 O

d) 3/16 AB, 3/8 A, 3/16 B, 1/4 O

e) 1/8 AB, 1/4 A, 1/8 B, 1/2 O

The lacI gene regulates transcription of the structural genes by producing a repressor molecule that is allosteric, meaning that

Describe primary, secondary, tertiary, and quaternary structure and differentiate among the structures based on

• Stabilization by intramolecular covalent bonds
• Stabilization by hydrogen bonds
• Stabilization by hydrophobic effect
• Function in binding ligand
• Regulation of function by allostery

Calculate ?Go for the oxidation of NADH by FAD. Why is this reaction significant? Where used in metabolic processes? Eo’ = -0.219 V for FAD (electron acceptor) and –0.315 V for NADH (electron donor)

Giving examples, explain why changing the pH to extreme values can have significant effects on catalytic function of enzymes  [4 points]. What can you use to minimize effects of changing pH on enzymatic reactions? [ 1 point]

A patient came into the office suffering from flu like symptoms, accompanied by Fever, Abdominal pain, Back pain, Chills, Excessive sweating, Fatigue with joints pain. The fever has been an up and down fever. The patient said he had visited a farm a week ago and had drunk milk. He did not know if the milk or the yoghurt he had caused this. 1. What infection does he have? Name the causative agent. 2. How did he become infected with this microbe? Explain the pathogenesis of this disease. 3. What are the virulence factors for this pathogen? What would be the treatment based on the virulence factors and why? Why is it considered as a food borne illness yet there are no symptoms that indicating it is? 4. Name another agent that also causes infection but in pasteurized dairy products? What are the virulence factors for this pathogen? How would you treat it based on that? 5. The patient does not have diarrhea, however how would the type of diarrhea assist in the identification of diseases. Give at least 3 examples stating the agent its disease, type of diarrhea, virulence factors and treatment.

what is the monomers of glucose and monosaccharides?

what does the polymerase chain reaction (PCR) accomplish?

1) PCR converts RNA to DNA

2) PCR corrects mutation in a gene

3) PCR makes many copies of DNA segment

4) PCR joins short segments of DNA to make one long segment

how does the ribosome select the next amino acid to add to a growing polypeptide chain?

1) the ribosome selects the amino acid that can form hydrogen bonds with the mRNA

2) the ribosome selects a tRNA that base-pairs with a codon

3) the ribosome senses that the amino acid fits into a binding pocket on the ribosome

4) the ribosome sense that the amino acid has the same codon as the DNA

Sally (a girl) wants to know what his IBW is. She is 5'7", what is her IBW?

Select one or more:

a. 148#

b. 200#

c. 135#

What is the best way to ensure you are getting a nutritionally adequate diet?

Select one or more:

a. Follow a poorly put together vegan diet.

b. Only eat one food group every week.

c. Go on a fad diet that removes entire food groups.

d. Eat a variety of foods from all food groups

The food label is removing the "calories from fat" on the label because the type of fat eaten is not as important as the quality of the fat.

Select one:

True

False

Outline four (4) important functional properties of microorganisms in fermented foods and give two (2) examples each of associated microbes.

How much carbon dioxide is produced from the complete aerobic catabolism of one molecule of linoleate via catabolic pathways?

A) 18 CO2

B) 17 CO2

C) 16 CO2

D) 15 CO2

E) 8 CO2

Which statement is TRUE regarding the late stages of starvation?

A) The brain has decreased its need for glucose by switching to lactate as a major energy source.

B) HIgh levels of acetyl-CoA derived from lipid catabolism lead to the production of acetoacetate.

C) Ketone bodies are produced from amino acids liberated from noncritical proteins.

D) Gluconeogenesis is extremely active in the liver because of the large amounts of lactate exported from the muscle.

E) Catabolism of triacylglycerols provides the major source of a gluconeogenic metabolite in the form of glycerol.