Written by Merel Dagher (PEACE Advisor) Click “read more” to see the answer. The correct answer is d. Tamoxifen is an antagonist because it prevents the binding of estrogen to the estrogen receptor by binding their first. It’s binding produces no response and therefore limits the amount of cells produced, which limits the overall...
Written by Merel Dagher Click “Read More” to see the answers. The correct answer is e. Steroid response is controlled by three different variables – the ability of the steroid to bind to the receptor, the ability of the receptor to bind to the DNA, and the ability of the receptor to bind to...
Written by Merel Dagher (PEACE Advisor) Click “Read More” to see the answers. The correct answer is e. Stem cells are awesome!
Written by Merel Dagher (PEACE Advisor) Click “Read More” to see the answer. The correct answer is a. DNA grows in the 5’ → 3’ direction because the hydroxide group on the 3’ carbon will attack the phosphate group on the 5’ carbon, thus resulting in a phosphodiester bond formation between the 5’ carbon...
Written by Merel Dagher (PEACE Advisor) Press “Read More” to see the answer. The correct answer is a. Osmolarity refers to salt levels in your blood, which is increased via the intake of salty foods or dehydration. In response to high levels of osmolarity, the hypothalamus produces ADH which is stored and released by...
Written by Merel Dagher (PEACE Advisor) Click “Read More” to see the answer. The correct answer is a. Cohesins keep sister chromatids together, whereas the synaptonemal complex keeps the homologous chromosomes paired. Telomeres are the caps at the end of the DNA strands; dynein and kinesin both use microtubules to “walk” along and dissolve...
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...