Biol 1406 Mock Exam 1

19) Which of the following correctly describes an element? A) A unit of a substance that cannot be broken down into smaller units while retaining its properties B) A substance that is required by life only in very small quantities C) Substances with high atomic mass D) Substances that are radioactive E) Both A and C

A) A unit of a substance that cannot be broken down into smaller units while retaining its properties

25) What does a compound consist of? A) At least two different elements B) Hydrogen bonded atoms C) Three or more reactants D) One metal and one nonmetal E) A combination of hydrogen and carbon

A) At least two different elements

40) Which of the following statements correctly describes DNA? A) DNA provides the master instructions for all the cell's functions B) It is used to break down sugars C) It is a discrete unit of hereditary information D) It was discovered by Robert Hooke E) Both A and C

A) DNA provides the master instructions for all the cell's functions

1) When a protein unravels causing it to lose its shape and function it is called what? A) Denaturation B) Warping C) Cellulose D) Dehydration reaction E) Hydrolysis

A) Denaturation

37) The attraction an atom has for shared electrons is known as _____. A) Electronegativity B) Electric reaction C) Polarity D) Solution E) Cohesion

A) Electronegativity

15) What disease is caused by a deficiency in iodine? A) Goiter B) Anemia C) Gout D) Scurvy E) Osteoporosis

A) Goiter

9) What is a possible explanation for why populations of bacteria may develop antibiotic resistance? A) Mutations in individual bacteria occur allowing them to survive and but not reproduce B) Antibiotic resistance develops in bacteria over time making the medicine less effective C) New medicines are developed D) Humans are less stressed today E) The bacteria have devolved into harmless strains

A) Mutations in individual bacteria occur allowing them to survive and but not reproduce

12) Polymers are macromolecules made by joining _______. A) Smaller molecules into chains B) By adding water C) By acidification D) One layer of phospholipids on top of a carboxyl layer E) None of the above

A) Smaller molecules into chains

5) Why do atoms bond to other atoms? A) To become stable B) To become positive C) To make molecules D) To make more space for electrons E) None of the above

A) To become stable

17) Life requires 25 essential (trace) elements. A) True B) False

A) True

21) An ion can be positive or negative. A) True B) False

A) True

26) Compounds can have different properties than their elements (i.e. a metal and poisonous gas becoming something edible). A) True B) False

A) True

4) Male and female sex hormones differ only in functional groups which cause varied molecular actions resulting in distinguishable differences between the two genders. A) True B) False

A) True

30) Which of the following best describes a solution? A) Uniform mixture of two or more substances B) A liquid that can dissolve other substances C) A dissolved substance D) A liquid that cannot evaporate E) Elements that are combined with polar covalent bonds

A) Uniform mixture of two or more substances

22) Cells construct a disaccharide from two_________. A) monosaccharides B) Starch molecules C) Cellulose molecules D) Chitin molecules E) Both B and C

A) monosaccharides

11) This functional group is double bonded to an oxygen atom and bonded to a hydroxyl group. A) Carbonyl B) Carboxyl C) Phosphate group D) Methyl group E) Hydromethyl group

B) Carboxyl

23) Radioactive isotopes are always harmful and should always be avoided. A) True B) False

B) False

41) Science has no limitations A) True B) False

B) False

36) What is the function of the radial sesamoid on a red panda? A) Nothing, it is vestigial B) Helps it to grasp bamboo C) For grooming D) To catch prey E) Both C and D

B) Helps it to grasp bamboo

18) What are the basic parts of an atom? A) Nucleus, protons, and electrons B) Neutrons, protons, and electrons C) Nucleotides, enzymes, and protons D) Polypeptides, neutrons, and electrons E) Monomers, electrons, and protons

B) Neutrons, protons, and electrons

28) A water strider insect can walk across water without sinking because of the ______ A) Cohesive properties of water B) Surface tension of water C) Adhesive properties of water D) Thermal energy of water E) dissolving ability of water

B) Surface tension of water

16) What is water cohesion due to? A) The triple bonds of oxygen B) The hydrogen bonds C) The covalent polar nature of the water molecule D) Radioactive isotopes E) All of the above

B) The hydrogen bonds

31) What is the pH of a neutral solution? A) 0 B) 2 C) 7 D) 9 E) 14

C) 7

39) Which of the following best describes natural selection? A) An inheritable trait that helps an organism to survive and reproduce B) A) The idea that living species are descendants of ancestral species C) A theory that states Organisms that are more adapted to their environment are more likely to survive and pass on the genes that aided their success D) A change in the genetic information E) Energy is neither created nor destroyed

C) A theory that states Organisms that are more adapted to their environment are more likely to survive and pass on the genes that aided their success

27) What are the building blocks for proteins? A) Chitin B) Starch C) Amino acids D) Functional groups E) Isomers

C) Amino acids

35) What is the smallest unit of matter that can still retain the properties of an element? A) Nucleus B) Electron C) Atom D) Molecule E) One unit of matter

C) Atom

7) How do cells make large molecules from a limited set of small molecules? A) Using enzymes that act as catalysts to speed up hydrolysis B) By creating a dual layer consisting of hydrophobic heads and hydrophobic tails C) By removing a water molecule D) By adding a water molecule E) Combining a phosphate group with a carboxyl group

C) By removing a water molecule

29) Which of the following is the correct order of classification? A) Kingdom, Domain, Phylum, Order, Class, Genus, Family, Species B) Domain, Phylum, Kingdom, Order, Family, Genus, Class, Species C) Domain, Kingdom, Phylum, Class, Order, Family, Genus, Species D) Phylum, Domain, Kingdom, Order, Family, Genus, Species, Class E) Domain, Kingdom, Order, Phylum, Genus, Class, Species, Class

C) Domain, Kingdom, Phylum, Class, Order, Family, Genus, Species

20) Electrons can be found orbiting in _______. A) Nuclear rings B) Atomic fields C) Electron shells D) Ionic bands E) Proton rings

C) Electron shells

14) _______ are a diverse group of molecules that are classified together because they do not mix well with water (hydrophobic). A) Glycogen B) Cellulose C) Lipids D) Monomers E) Chitin

C) Lipids

8) Which of the following is not a reason why species adapt? A) Competition for resources B) Climatic changes C) Lots of suitable habitat D) To increase reproductive success E) Avoid predation

C) Lots of suitable habitat

10) Which of the following do not support the theory of evolution by natural selection? A) fossil records B) Observations C) Unrelated species looking exactly alike D) DNA comparisons E) experiments

C) Unrelated species looking exactly alike

38) Who is credited with the theory of evolution? A) Robert Hooke B) Carl Linnaeus C) Gregor Mendel D) Charles Darwin E) Antonie van Leeuwenhoek

D) Charles Darwin

13) Which polysaccharide do insects and crustaceans use to build their exoskeleton? A) Glucose B) Enzyme C) Glycogen D) Chitin E) Cellulose

D) Chitin

34) Which of the following is not a property of water? A) It can dissolve more substances than any other liquid. B) It can exist as a liquid, solid, or a gas. C) It is less dense as a solid than as a liquid. D) It gains hydrogen atoms as it cools. E) Water's hydrogen bonds moderate temperature.

D) It gains hydrogen atoms as it cools.

6) DNA is an example of a ________? A) Amino acid B) Monosaccharide C) Lipid D) Macromolecule E) Micro molecule

D) Macromolecule

42) A cell is the basic unit of life because A) It requires energy B) It can reproduce C) It can grow and develop D) Cells have mechanisms built in to help maintain homeostasis E) All of the above

E) All of the above

32) What happens when water freezes? A) The molecule becomes stable B) The molecule loses one hydrogen atom C) There is space between the molecules D) It becomes acidic E) Both A and C

E) Both A and C

24) Which of the following best describes a covalent bond? A) Electrons are transferred B) Electrons are ionized C) Electrons are shared equally D) Electrons are shared unequally E) Both C and D

E) Both C and D

3) Compounds like methane are only composed of hydrogen and carbon are called what? A) Isomers B) Monosaccharides C) Glycogen D) Hydroxyl group E) Hydrocarbons

E) Hydrocarbons

2) Which of the following is not a characteristic of a living organism? A) Responds to the environment B) Requires energy C) Ability to reproduce D) Grows and develops E) None of the above

E) None of the above

33) Which of the following is not made of matter? A) Plants B) Fungi C) Bacteria D) Rocks E) None of the above

E) None of the above