Biology Answers

What other samples (apart from water) can be tested using this method; name 4 samples/products?

What selective-differential media can be used for one-step detection of the following pathogens from water samples using the membrane filtration technique:

- Coliforms

- Salmonella

- Pseudomonas

The standard pore size of filter paper used for microbiological analysis of water is 0.45 micron. Why is this the most popular choice?

What is the likelihood that the children in Punnett square 2 will have earlobes that are not attached?

—Estimate the net charge of a Glu–Tyr dipeptide at pH 6.0.

Which of the following would NOT let you know that something ypu found was alive?

A. COMPONENTS MADE OF CARBOJ AND HYDROGEN

B. THR USE OF COMPLEX TOOLS

C. EATING AND PRODUCING WASTE

D. CELLULAR REPLICATION AND GROWTH

In peas, a gene for tall plants (T) is dominant over its allele for short plants (t). The gene for smooth peas (S) is dominant over its allele for wrinkled peas (s). The genes are not linked. Determine both phenotypic and genotypic ratios for the results of each of the following crosses:

1.1 homozygous tall wrinkled x short heterozygous smooth.                  [26 marks]

1.2. short heterozygous smooth x heterozygous tall wrinkled.                 [26 marks]

1.3 heterozygous tall homozygous smooth x short wrinkled.                  [26 marks]