Biology Answers

Discuss the rumen as an example of a complex ecosystem

a. In mice, the allele for coloured fur (C ) is dominant over white fur (c). The allele V for normal behaviour is dominant over the allele v for abnormal behaviour.

Give the genotypes of the parents in each of the following crosses:

i. Coloured, normal mice mated with white, normal mice produced 29 coloured, [5] normal and 10 coloured, abnormal progeny

ii. Coloured, normal mice mated with coloured, normal mice produced 35 coloured, normal, 13 coloured, abnormal, 11 white, normal and 4 white, abnormal progeny

The velocity of an enzyme-catalyzed reaction that follows Michaelis-Menten kinetics was

measured at several substrate concentrations (shown below).

i. Calculate 𝐾M and V𝑚𝑎𝑥 from the data given.

ii. Determine KM and Vmax

iii. The second set of velocities represent the rate of the reaction when an inhibitor is

added. Plot these on the same graph as the first and determine KM and Vmax

iv. What type of inhibitor is it?

[S](M) V0 (μM/min) V(+ inhibitor)

0.00006 6.66 4

0.0001. 9.30 3

0.002. 15 6

0.006 22.03 8

0.08 29 9

0.2. 35.6 10.6

With help of diagram explain the pentose phosphate pathway or hexose monophosphate shunt,

Mycotickeretis, diagnosis, history, control and treatment

To what extent is biotic invasion and native species loss creating ecosystems with altered properties?

How would you verify that the plasmid contains your insert of interest, in the proper position and orientation?

1.Give 5 reasons why the study of clay mineralogy is of importance in agriculture

2.State 6 uses of kaolinite

Provide and discuss the survival mechanisms implored by fungi

Write an essay on human schistosomiasis and explain its distribution, transmission, symptoms, diagnosis, treatment, prevention, and control with reference to South Africa