Author: Anonymous

The Dscam gene in Drosophila melanogaster (fruit fly) has 115 introns.  Over 18,000 different Dscam proteins have been found in D. melangaster body fluids.  The proteins have a variety of functions including involvement in nerve cell growth and immune function.  This one gene can make so many proteins due to 

Which of the following statements is NOT a correct distinction between DNA replication and transcription?

The pronghorn (Antilocapra americana) is a species of artiodactyl (even-toed, hoofed) mammals found in the interior western and central North America.  The karyotype of the pronghorn is shown below.  From this karyotype, you know the pronghorn is [1] A somatic cell of a pronghorn gets a signal to divide.  In prophase of mitosis, there are [2] chromosomes and [3] sister chromatids in the cell, and at the end of mitosis, there are [4] chromosomes in each of the daughter cells. The highest level of packaging that describes what is seen in this karyotype is [5]   

A tRNA with an anticodon UAA will be charged with which amino acid?

5.2.1 Explain a safety precaution that should be taken when carrying out this test. (2)

6.3.1 Name the enzyme that digests the starch in the barley. (1)      

9.16 What helps oxygen to be absorbed rapidly into the blood in the lungs? (1)

3 The human kidney removes urea from the blood.   3.1  Name two other substances the kidney removes from the blood. (2)

6.2.2 Why is it important to use sterile bottles? (1)

QUESTION 7