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