Bio Final
Hydrogen has one valence electron. How many covalent bonds does a hydrogen atom typically form? A. 3 B. 1 C. 7 D. 2 E. 4
1
Hydrogen has one valence electron. How many covalent bonds does a hydrogen atom typically form? Answers: 3 1 7 2 4
1
A chlorine atom has 17 protons and 18 neutrons. What is its atomic mass? Selected Answer: 1 amu 17 amu 18 amu 35 amu 306 amu
35 amu
Which is a property of unsaturated fats? A. They are more common in animals B. They are generally liquid at room temperature C. They have no double bonds in the carbon chains of their fatty acids D. They have fewer fatty acids per fat molecule than do saturated fats E. They contain more hydrogen than saturated fats that have the same number of carbon atoms
B. They are generally liquid at room temperature
If antacid had the pH of 10.0, then it might be considered A. Neutral B. Sour C. Basic D. Acidic E. B + C
Basic
All organisms are considered "alive, or living" is for those organisms to have all of the following characteristics, EXCEPT A. Ability to grow larger in size into adulthood B. Maintain homeostasis C. Being eukaryotic D. Ability to do photosynthesis E. Three of the above
Three of the above
The formation of sodium chloride (NaCl) is the result of Answers: A. covalent bonding B. chemical unreactivity C. attraction between opposite charges D. repelling between the same charges E. None of the above
attraction between opposite charges
Which is the main structural component of the walls that surround plant cells? Answers: A. cellulose B. sugars C. starches D. fatty acid E. glucose
cellulose
Which of the following is(are) shared by both prokaryotic and eukaryotic cells? Answers: A. cell wall B. nucleus C. cytoplasm D. organ systems
cyptoplasm
Which of the following is(are) shared by both prokaryotic and eukaryotic cells? Answers: cell wall nucleus cytoplasm organ systems
cytoplasm
What carbohydrate energy storage molecule is found in animal liver and muscle cells? Answers: A. starch B. cellulose C. glycogen D. a fatty acid E. cholesterol
glycogen
The covalent bond between a hydrogen atom and the oxygen atom in water is formed when: A. hydrogen and oxygen share an electron pair B. hydrogen and oxygen both lose electrons from their outer shells C. hydrogen and oxygen both gain electrons in their outer shells D. hydrogen loses an electron from oxygen
hydrogen and oxygen share an electron pair
The cohesiveness between water molecules is due largely to _________. Answers: A. ionic bonds B. hydrogen bonds C. polar covalent bonds D. nonpolar covalent bonds E. hydrophobic interactions
hydrogen bonds
Which of the following is a key component of the cytoskeleton? Answers: A. centrosome B. microtubules C. DNA D. ribosomes E. endoplasmic reticulum
microtubules
All members of the same species occupying the same area at the same time constitute a(n) Answers: A. population B. community C. ecosystem D. biosphere
population
By definition, an organism that is eukaryotic: Answers: A. is a protist B. is unicellular C. possesses a nucleus D. possesses organ systems E. belongs to the domain Bacteria
possesses a nucleus
Which of the following fatty acids include one or more adjacent pairs of carbon atoms joined by a double bond? Answers: A. saturated fatty acids B. monounsaturated fatty acids C. unsaturated fatty acids D. polyunsaturated fatty acids E. trans fatty acids
unsaturated fatty acids
