Biochemistry Answers

The table shows the concentration of three different ions inside the cells in a plant root and

in the water in the soil

Ion Concentration in plant root cells /m3 Concentration in soil water /m3

A 0.5 0.5

B 1.0 0.4

C 0.6 0.8

a. Which ion has been moved into the root hair by active transport? Explain your answer. [2]

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b. Which ion has moved into the root hair by diffusion? Explain your answer. [2]

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c. Which ion has been moved out of the root hair by active transport? Explain your answer.

which life history patterns in some rotifers are adapted to living in small bodies of water

How different amino acids act as acid or base catalyst during enzymatic reaction? Write the general acid (protonated) and base (deprotonated) form of following amino acids: Arginine, Tyrosine, Glutamate, Histidine, Serine, and Cysteine. How different amino acids act as acid or base catalyst during enzymatic reaction? Write the general acid (protonated) and base (deprotonated) form of following amino acids: Arginine, Tyrosine, Glutamate, Histidine, Serine, and Cysteine. 

1. a) In the quantitative determination of moisture, why is 5-6 gram ample used instead of 1 gram.

b) Describe two different sources of an experimental error (as opposed to human error) that might enter into the determination of moisture as carried out in this experiment, that is, explain why the% moisture on the same kind of substance may vary.

c) Recall that the average molecular weight cut off of the dialysis tubing is 14,000 amu. Are protein larger or smaller than 14,000 amu? How about sugars? Explain.

d) Explain why agitation of the solution surrounding the dialysis sack is important to achieve the amount of dialysis.

Explain the structural basis of the high group transfer potential of ATP.