Help with a few Biology problems

Insorak
Wed, 10 Feb 2010 19:44:22 +0000

Okay, I don’t think I’m reading this problem correctly.

The Hardy-Weinberg equilibrium principle assumes all of the following statements EXCEPT:

The proportion of alleles in a population tends to remain stable
The frequencies of dominant and recessive alleles for a given trait in a gene pool of a large population can bedetermined mathematically
Genotype frequencies in a large population are unaffected by Mendelian segregation and recombination of alleles
For a given trait the frequency of dominant alleles is greater than that of recessive alleles
For a given trait the frequency of the genotype of the heterozygous population can be determined mathematically

The fourth one? Is it really as obvious as I think it is?



You extract RNA from liver cells and then carry out an agarose gel electrophoresis of the liver RNA. The RNAfragments are then transferred to an RNA-binding membrane (nitrocellulose or nylon) using capillary action. Next, youhybridize a probe for gene X to the RNA on the membrane. Which of the following statements regarding yourexperiment is true?

You are trying to determine how many copies of Gene X are in liver cells
You are trying to determine if the Gene X protein is present in liver cells
You are trying to determine if Gene X is expressed in liver cells
You are trying to determine the chromosomal location of Gene X
You are trying to determine whether Gene X has a mutant sequence

Again, the fourth one, yes?



Which of the following is NOT a second messenger?

Calcium ion
Magnesium ion
Diacyl glycerol
Inositol trisphosphate (IP3)
Cyclic AMP

These are all second messengers…