Biochemistry Answers

A solution containing Asp (pI=2.98), G (pI=5.97), Thr (pI=6.53), Leu (pI=5.98) and Lys (pI=9.74) in a pH 3.0 citrate buffer was applied to a Dowex-50 cation exchange column equilibrated with the same buffer. In what order will the five Amino Acids elute from the column

Indicate whether the members of each of the following pairs of monosaccharides have the same molecular

formula.

______________ a. D-Glucose and D-galactose

______________ b. D-Glucose and D-fructose

______________ c. D-Glyceraldehyde and dihydroxyacetone

______________ d. D-Ribose and 2-deoxy-D-ribose

Indicate at what carbon atom(s) the structures of each of the following pairs of monosaccharides differ.

______________ a. D-Glucose and D-galactose

______________ b. D-Glucose and D-fructose

______________ c. D-Glyceraldehyde and dihydroxyacetone

______________ d. D-Ribose and 2-deoxy-D-ribose

Write a paragraph of at least 250 words to elucidate your opinion on the following statement:(use Havard referencing)

”Natural Science as a compulsory school subject in the Senior Phase prepare learners for Life Sciences in Grade 10”

Write a paragraph of at least 250 words to elucidate your opinion on the following statement:(use Havard referencing)

”Natural Science as a compulsory school subject in the Senior Phase prepare learners for Life Sciences in Grade 10”

Technicalities

-minimum words;250

-letter type;Arial

-Referencing method;Havard Referencing -Letter orientation; justified

Gerhart and Pardee measured ATCase activity in the presence of a variety of purine and pyrimidine derivatives. Their results are presented in Table 16.2. What compound(s) were the most effective inhibitors? activators? Explain the significance of the metabolites that served as inhibitors or activators in the context of the biosynthetic pathway presented in Figure 16.1.

Table 16.2: Effect of nitrogen bases, nucleosides and nucleotides on ATCase activity. *Indicates stimulation. (Based on Gerhart and Pardee, 1962.)

Compound

Inhibition, % (Conc = 2 mM)

Cytosine

0

Cytidine

24

CMP

38

dCMP

48

CTP

86

dCTP

88

UTP

8

GTP

35

dGTP

31

ATP

-180*

dATP

-162*

In which phase does natural science and technology split into two separate learning areas

Which natural science strand in the senior phase develops into life science in grade 10

1. what is the physiological significance of branching in polysaccharides

What is the cause of lactose intolerance