Written by Merel Dagher (PEACE Advisor)  Press “Read More” to see the answers.    The correct answer is a. Both B cells and T cells are involved in the body’s immune, or lymphatic, system. B cells, however, are matured in the bone marrow and produce antibodies that recognize various antigens present in the body....

Written by Merel Dagher (PEACE Advisor) Click “Read More” to see the answers.  The correct answer is b. Cyclin B is needed, with CDK, to propel the cells from G2 to M phase. Cyclin A is needed, with CDK, to propel the cells from G1 to S phase. Cyclin A and B are constantly...

Written by Merel Dagher (PEACE Advisor)  Press “Read More” to see the answers.  The correct answer is b. The kidney is part of the body’s excretory, or urinary, system. Its functional unit, the nephron, works to regulate the concentration of water in the blood. The nephron is a long tube-like structure that has multiple...

Written by Merel Dagher (PEACE Advisor)  Click “Read More” to see the answers.  The correct answer is e. Bacteria prefer to consume glucose first. Bacteria cannot grow in lactose unless the enzyme B-galactosidase is transcribed in order to cleave the glycosidic bonds in lactose (lactose is a disaccharide consisting of the sugars galactose and...

Written by Merel Dagher (PEACE Advisor)  Click “Read More” to see the answers.  The correct answer is c. The Juxtaglomerular Apparatus, which is conveniently located next to the Afferent Arteriole, stimulates the release of renin, which eventually causes an increase in blood pressure. It should be noted that Angiotensin-II can also bind to a...

Written by Merel Dagher (PEACE Advisor)  Click “Read More” to see the answers.  The correct answer is E. All the other pairings are correct. Fleming and Flurkey are discoverers of ampicillin. 

Written by Merel Dagher (PEACE Advisor)  Press “Read More” to see the answers.  The correct answer is a. Noggin works like a negative inductive signal that inhibits BMP-4 from binding to its receptor. When the levels of Noggin are higher than those of BMP-4, more dorsal structures will be formed. When the levels of...

Written by Merel Dagher (PEACE Advisor)  Press “Read More” to see the answers.  The correct answer is b. The Central Dogma states that DNA is transcribed into mRNA which is then translated into proteins. It clearly shows the purpose of RNA (to make proteins) and DNA (to make RNA). It also explains what is...

Written by Merel Dagher (PEACE Advisor)  The correct answer is b. Food is taken in via the mouth, where amylase is secreted by the salivary glands. Amylase helps the breakdown of sugars. After that, the food travels down to the esophagus, where it eventually enters the stomach. The parietal cells in the stomach secrete...

Written by Merel Dagher (PEACE Advisor)  Click “Read More” to see the answers.  The correct answer is d. Recombination occurs in Meiosis I and allows for the exchange of some DNA between homologous chromosomes – when the meiotic division occurs, the cells, as a result, are different from their parents (potentially) and different from...