Written by Merel Dagher  Which of the following increases the affinity for binding oxygen in hemoglobin? a.     H+ ions increasing b.     CO2 concentration increasing c.     2,3-BPG concentration increasing d.     Stabilization of the T-state e.     exchanging a His for Ser residue in Hb Click “Read More” to see the answer.  The correct answer is e....

Written by Merel Dagher (PEACE Advisor)  Which of the following is incorrect? a.     the “Age of Cycadophyta” is the Mesozoic b.     Gnetum, Ephedra, and Welwitschia are three types of Gnetophytes c.     Palm trees are Cycadophytes d.     Gingko and algae have a symbiotic relationship e.     Pacific Yew (also known as Taxol) comes from conifers  Click...

Written by Merel Dagher (PEACE Advisor)  Which of the following was responsible for initially creating an oxygen-rich environment? a.     cyanobacteria b.     fungi c.     algae d.     protists e.     bryophytes Click “Read More” to see the answer.  The correct answer is a. Thanks to the photosynthetic activity of cyanobacteria, the atmosphere eventually accumulated levels of oxygen...

Written by Merel Dagher (PEACE Advisor)  Which has a more acidic environment – the lungs or tissues? Why? a.     lungs – so Hb can bind O2 more readily b.     lungs – so Hb can release O2 more readily c.     tissues – so Hb can bind O2 more readily d.     tissues – so Hb can...

Written by Merel Dagher (PEACE Advisor)  How many cells are found in the ovary, prior to fertilization, and what are they called. a.     2 eggs, 2 synergids, 2 polar nuclei, 3 antipodals b.     1 egg, 2 synergids, 2 polar nuclei, 3 antipodals c.     1 egg, 3 synergids, 2 polar nuclei, 1 antipodal d.     1...

Written by Merel Dagher (PEACE Advisor)  Which of the following has the trophic mode matched to its correct definition? (More than one may be correct) a.     photoautotroph – uses sunlight and carbon dioxide to obtain energy and carbon b.     photoheterotroph – uses sunlight and organic materials to obtain energy and carbon c.     chemoautotroph –...

Written by Merel Dagher (PEACE Advisor)  The following is a short answer question. Please answer each of the respective parts in a short-response manner (with respective sentences and calculations).  Glutamic Acid has three ionizable groups, with the respective pKas of 2.10, 4.07, and 9.47. a.     Draw the structure of Glutamic Acid and label the...

Written by Merel Dagher (PEACE Advisor)  One of the differences between monocots and “dicots” is the fate of the endosperm. Describe the ploidy and what happens in these different types of flowers. a.     Ploidy: 3n, as a result of the sperm fertilizing the two polar nuclei; in monocots, the endosperm is absorbed by the...

Written by Merel Dagher (PEACE Advisor)  Which of the following are single-celled organisms? Select all that apply. a.     Archaea b.     Bacteria c.     Fungi d.     Protists e.     All of the above Click “Read More” to see the answer(s).  The correct answer is both a and b. Archaea and Bacteria are domains that consist of prokaryotes....

Written by Merel Dagher (PEACE Advisor)  What is a simple fruit? a.     the flower contains multiple ovaries b.     multiple flowers with many ovaries c.     one flower with one ovary d.     none of the aboveClick “Read More” to see the answer.  The correct answer is c. A simple fruit is one that comes from one...