Answer the following question given this paragraph: Homeobox genes are involved in the regulation of genes important to development. They encode transcription factors. Q: What types of genes encode transcription factors? Choices: - glycosyl transferases - isozyme genes - rohail genes - homeobox genes A:
homeobox genes
Answer the following question given this paragraph: Q: Hormones vary widely in molecular size and type as well as? Choices: - simple regulators - strange regulators - foreign regulators - local regulators A:
local regulators
Q: Answer the following question given this paragraph: The chemical reaction that is the opposite of oxidation is called reduction. Following from the notion that oxidation was originally thought to mean only the addition of oxygen, reduction was thought to be only the removal of oxygen from a substance. Many naturally occurring metal ores are present as oxides. The pure metals can be extracted by reduction. Iron is obtained from iron(III) oxide by reacting with carbon at high temperatures. Q: What chemical reaction is the opposite of oxidation? Choices: - mutation - condensation - evaporation - reduction A:
A: reduction
Question: Answer the following question given this paragraph: Solution First, write out the electron configuration for each parent atom. We have chosen to show the full, unabbreviated configurations to provide more practice for students who want it, but listing the coreabbreviated electron configurations is also acceptable. Next, determine whether an electron is gained or lost. Remember electrons are negatively charged, so ions with a positive charge have lost an electron. For main group elements, the last orbital gains or loses the electron. For transition metals, the last s orbital loses an electron before the d orbitals. (a) Na: 1s22s22p63s1. Sodium cation loses one electron, so Na+: 1s22s22p63s1 = Na+: 1s22s22p6. (b) P: 1s22s22p63s23p3. Phosphorus trianion gains three electrons, so P3: 1s22s22p63s23p6. (c) Al: 1s22s22p63s23p1. Aluminum dication loses two electrons Al2+: 1s22s22p63s23p1 = Al2+: 1s22s22p63s1. (d) Fe: 1s22s22p63s23p64s23d6. Iron(II) loses two electrons and, since it is a transition metal, they are removed from the 4s orbital Fe2+: 1s22s22p63s23p64s23d6 = 1s22s22p63s23p63d6. Sm: 1s22s22p63s23p64s23d104p65s24d105p66s24f6. Samarium trication loses three electrons. The first two will be lost from the 6s orbital, and the final one is removed from the 4f orbital. Sm3+: 1s22s22p63s23p64s23d104p65s24d105p66s24f6 = 1s22s22p63s23p64s23d104p65s24d105p64f5. Q: Remember electrons are negatively charged, so ions with a positive charge have lost what? Choices: - proton - neutron - atom - electron A:
Answer: electron
*Question*
Answer the following question given this paragraph: In addition to having a plasma membrane, cytoplasm, a nucleus and ribosomes, eukaryotic cells also contain membrane-bound organelles . Each organelle in a eukaryote has a distinct function. Because of their complex level of organization, eukaryotic cells can carry out many more functions than prokaryotic cells. The main differences between prokaryotic and eukaryotic cells are shown in Figure below and listed in Table below . Keep in mind that some eukaryotic cells may have characteristics or features that other eukaryotic cells lack, such as the cell wall. Q: Which type of cell can carry out more functions, eukaryotic cells or prokaryotic cells? Choices: - chromosomal cells - Prokaryotic Cells - both - eukaryotic cells A:
**Answer**
eukaryotic cells
*Question*
Answer the following question given this paragraph: The transition metals are an interesting and challenging group of elements. They have perplexing patterns of electron distribution that don't always follow the electron filling rules. Predicting how they will form ions is also not always obvious. Q: What kind of metals have perplexing patterns of electron distribution that don't always follow the electron filling rules? Choices: - solution - transformation - variating - transition A:
**Answer**
transition