Biology Chapter 3

52) What functional group makes a carbohydrate hydrophilic? A) -OH B) -NH 2 C) -SH D) -R E) -C-H

A) -OH

25) Which of the following is an inorganic molecule? A) CaCO 3 B) C 6 H 12 O 6 C) C 256 H 381 N 65 O 79 S 6 D) C 18 H 34 O 2 E) CH 4

A) CaCO 3

14) A gene in DNA is the code for assembling a sequence of A) amino acids. B) glucose molecules. C) fatty acids used in a fat. D) sugars. E) functional groups.

A) amino acids.

40) Steroid are classified as A) proteins. B) lipids. C) carbohydrates. D) nucleic acids. E) fats.

B) lipids.

17) Select the correct association. A) carbohydrates—serve to insulate, protect, and store energy B) lipids—contain the codes used to construct proteins C) proteins—have three forms: monosaccharides, disaccharides, and polysaccharides D) nucleic acids—provide the body with energy E) carbohydrates—include glucose, sucrose, and starch

E) carbohydrates—include glucose, sucrose, and starch

32) When a person orders a cheeseburger with lettuce, tomato, and mayonnaise, which of the following would be a true statement about the nutritional intake? A) Amino acids can be obtained from the hamburger patty. B) Glycogen will be obtained from the cheese. Version 1 11 C) Fat will be consumed from the lettuce and tomato. D) Cellulose will be consumed from the mayonnaise. E) Carbohydrates and cellulose will be obtained from the hamburger patty.

A) Amino acids can be obtained from the hamburger patty.

15) Select the incorrect association. A) glucose -monosaccharide Version 1 5 B) cellulose -building block for cell walls in plants C) sucrose - table sugar D) fructose - a polysaccharide E) starch - a long chain of glucose molecules

D) fructose - a polysaccharide

21) The following figure represents which process? A) dehydration synthesis B) denaturation C) polyunsaturation D) hydrolysis E) combustion

A) dehydration synthesis

9) A saturated fat has Version 1 3 A) no double bonds. B) more than one double bond. C) only one double bond. D) many omega-3 fatty acids. E) long protein chains.

A) no double bonds.

43) Which of the following is a functional group present in amino acids? A) -PO 4 B) -OH C) -NH 2 D) -C=O E) -CH 3

C) -NH 2

16) Which of the following is a true statement about proteins? A) The three dimensional shape of a protein is a result of its secondary structure. B) Denaturation restores proteins' shape and function. C) Proteins are used to produce DNA. D) Proteins are monomers and they are built from amino acid polymers. E) Proteins are used to produce many types of hormones.

A) The three dimensional shape of a protein is a result of its secondary structure.

18) Which of the following terms should be categorized separately from the others? A) muscle B) antibodies C) sucrose D) enzymes E) hair

C) sucrose

2) A polypeptide forms a beta pleated sheet or an alpha helix as its primary structure. ⊚ true ⊚ false

⊚ false

8) A triglyceride is formed when three fatty acids join a glycerol by a A) hydrolysis reaction. B) dehydration synthesis reaction. C) polymeric reaction. D) digestive reaction. E) evaporation reaction.

B) dehydration synthesis reaction.

19) Which of the following is a hydrolysis reaction? Version 1 6 A) amino acids forming proteins B) glycogen forming glucose molecules C) nucleotides forming DNA D) glucose units forming starch E) fatty acids andglycerol forming a fat

B) glycogen forming glucose molecules

35) A starch molecule is to glucose as A) a protein is to a polypeptide. B) DNA is to an amino acid. C) a lipid is to nucleic acid. D) a protein is to an amino acid. E) fatty acid is to a fat.

D) a protein is to an amino acid.

54) In which of the following is the correct monomer matched with its polymer? A) fatty acid - DNA B) monosaccharide - lipid C) glycerol - carbohydrate D) amino acid - protein E) nucleotide - carbohydrate

D) amino acid - protein

48) How does DNA differ from RNA? A) DNA is in plants; RNA is found in animals. 48) How does DNA differ from RNA? A) DNA is in plants; RNA is found in animals. B) DNA is comprised of a double-strand; RNA is a single-strand. C) DNA is made from amino acids; RNA is made from nucleotides. D) DNA is used by all living things; RNA is used only in plants. E) DNA is seen in animals; RNA is seen in all living things.

B) DNA is comprised of a double-strand; RNA is a single-strand.

10) Refer to the figure. Which of the following is true regarding the labeled plasma membrane? A) Parts X and Z are hydrophobic. B) Parts W and Z are hydrophilic. C) Parts X and Y are hydrophilic. D) Parts W and Y are hydrophobic. E) Parts W and X are hydrophilic.

B) Parts W and Z are hydrophilic.

7) Wood and paper are composed of A) chitin. B) cellulose. C) glycogen. D) cholesterol. E) lipid.

B) cellulose.

11) Testosterone is a lipid-based hormone; insulin is a ________-based hormone. A) saccharide B) protein C) steroid Version 1 4 D) carbohydrate E) nucleic acid

B) protein

55) Which of the following is an organic molecule? Version 1 17 A) NaOH B) HCl C) CO 2 D) C 43 H 64 O 4 E) H 2 O

D) C 43 H 64 O 4

36) How are lipids different from other categories of biological molecules? Version 1 12 A) They are not seen in all living things. B) They do not have carbon. C) They are much more complex. D) They will not combine with water. E) They are not organic.

D) They will not combine with water.

47) The primary structure of a protein refers to the A) interactions among two or more polypeptides. B) alpha helix or pleated sheets. C) side groups of the amino acids. D) number and sequence of amino acids. E) DNA nucleotide sequence that coded for it.

D) number and sequence of amino acids.

30) The principle role for sugars in living things is to A) form cell membranes. B) serve as a form of long-term energy storage. C) create our genetic code. D) serve as a form of immediate cellular energy. E) produce hormones.

D) serve as a form of immediate cellular energy.

33) Plants store their sugar in the form of A) protein. B) glycogen. C) cellulose. D) starch. E) glucose.

D) starch.

41) Which one of the following is a potential danger of anabolic steroids? A) liver problems B) psychological disorders C) male breast development D) heart problems E) All of the above answers are problems associated with anabolic steroids.

E) All of the above answers are problems associated with anabolic steroids.

1) When starch is digested, water molecules are used to break the bonds holding the mono-saccharide sub units together. ⊚ true ⊚ false

true

In sickle-cell disease, malformation of red blood cells is caused by only one error in the genetic code for hemoglobin. ⊚ true ⊚ false

⊚ true

20) Which word should be categorized separately from the others? A) fats B) steroids C) glycogen D) phospholipids E) lipids

C) glycogen

42) Which of the following is a feature that proteins and polysaccharides share? A) They are made of repeated monomer units. B) They are both made from fatty acids. C) They both contain glucose. D) They are both long chains of repeated nucleotide units. E) They both contain phosphorus.

A) They are made of repeated monomer units.

26) In a dehydration reaction, ________. In order for this to occur water is ________. A) monomers are joined to become a polymer; removed B) polymers are broken up to form monomers; added C) monomers are broken up to form polymers; added D) polymers are joined to form monomers; removed E) polymers are broken up to form monomers; removed

A) monomers are joined to become a polymer; removed

23) The polymer shown below is comprised of what kind of subunits? A) nucleotides B) triglycerides C) monosaccharides D) bases E) amino acids

A) nucleotides

27) Amino acids are needed to build ________,just as ________ are needed to create DNA. A) proteins; nucleotides B) fatty acids; amino acids C) polysaccharides; monosaccharides D) RNA; amino acids E) triglycerides; nucleotides

A) proteins; nucleotides

5) Hydrolysis of sucrose, a disaccharide, results in A) two monosaccharides. Version 1 2 B) a polypeptide. C) three monosaccharides. D) two glycerol units. E) the formation of a polysaccharide.

A) two monosaccharides.

Which of the following is an organic molecule? A) CO 2 B) C 6 H1 2 O 6 C) NaCl D) CaCl 2 E) H 2 O

B) C 6 H1 2 O 6

29) Which of the following elements are found in glucose? A) C, H B) C, H, O C) C, H, O, P D) C, H, O, N E) C, H, Cl, O

B) C, H, O

38) What makes saturated triglycerides considerably less healthy than unsaturated ones? A) They taste better than other fats. B) They possess no double bonds between carbon atoms, which makes them more tightly packed together. C) Individuals tend to consume more saturated fats than unsaturated fats. D) Unsaturated fats are found in processed foods more frequently. E) They are digested more quickly by the body.

B) They possess no double bonds between carbon atoms, which makes them more tightly packed together.

4) Deoxyribose is a sugar found in A) all proteins. B) lipids. C) DNA. D) glycogen. E) RNA.

C) DNA.

49) A nucleotide is made of which of the following chemical components? A) a nitrogen-containing base, an amino acid, and a five-carbon sugar B) a nitrogen-containing base, an amino acid, and a phosphate group C) a nitrogen-containing base, a phosphate group, and a sugar D) a nitrogen-containing base, a fatty acid, and an amino acid E) a long chain of glucose units

C) a nitrogen-containing base, a phosphate group, and a sugar

12) Which of the following is in correct order from smallest to largest? A) peptide - amino acid - polypeptide B) amino acid - polypeptide - peptide C) amino acid - peptide - polypeptide D) protein - glycerol - amino acid E) disaccharide - polysaccharide - monosaccharide

C) amino acid - peptide - polypeptide

28) The four main categories of organic macromolecules are A) monosaccharides, disaccharides, trisaccharides, and polysaccharides. B) proteins, DNA, waxes, and sugars. C) carbohydrates, lipids, proteins, and nucleic acids. D) RNA, DNA, steroids, and fats. E) lipids, starches, DNA, and protein.

C) carbohydrates, lipids, proteins, and nucleic acids.

50) A molecule is said to be organic if it contains A) double bonds. B) hydrogenbonds. C) carbon andhydrogen atoms. D) carbon and oxygenatoms. E) two or moreatoms.

C) carbon andhydrogen atoms.

6) Scientists created an enzyme that will break down any type of carbohydrate. If given to humans, which of the following could be used as a new food source? A) glucose B) glycerol C) cellulose D) cholesterol E) protein

C) cellulose

34) Humans store glucose in the form of A) lactose. B) starch. C) glycogen. D) glucose. E) cellulose.

C) glycogen.

53) The basic building block or subunit of many biological molecules is called a(n) A) quaternarystructure. B) polymer. C) monomer. D) isomer. E) chain.

C) monomer.

13) Which of the following correctly lists the parts of a nucleotide of RNA? A) nitrogen-containing base, deoxyribose, phosphate B) sulfur-containing base, ribose, phosphate C) nitrogen-containing base, ribose, phosphate D) nitrogen-containing base, ribose, sulfur E) amino acid, glycerol, nitrogen-containing base

C) nitrogen-containing base, ribose, phosphate

31) Glycogen is a ________ made of many ________. A) simple sugar; amino acids B) peptide; amino acids C) polymer; glucose molecules D) protein; fatty acids E) nucleic acid; nucleotides

C) polymer; glucose molecules

39) A fatty acid that has double bonds is called A) steroid. B) cholesterol. C) unsaturated. D) a bonded. E) organic.

C) unsaturated.

44) Which of the following would describe a polypeptide? A) fatty acids joined to glycerol by hydrolysis reactions B) glucose molecules joined by dehydration synthesis reactions C) nucleotides broken by hydrolysis reactions D) amino acids joined by dehydration synthesis reactions E) a repeated sequence of carbon and hydrogen atoms

D) amino acids joined by dehydration synthesis reactions

22) The figure below represents the formation of a ________ molecule by the process of ________. A) glycogen;hydrolysis B) DNA; dehydration synthesis C) protein;hydrolysis D) fat; dehydration synthesis E) polysaccharide;hydrolysis

D) fat; dehydration synthesis

51) The term "functional" is used in the phrase "functional group" because it describes a group of atoms that A) are organic. B) make the entire molecule hydrophobic. Version 1 16 C) prevent interaction with other molecules. D) help determine the chemical properties of an organic molecule. E) make the entire molecule hydrophilic.

D) help determine the chemical properties of an organic molecule.

37) If a material mixes readily with water, it is identified as A) dehydrated. B) hydrophobic. C) saturated. D) hydrophilic. E) salty.

D) hydrophilic.

45) What is the function of a peptide bond? A) joins a sodium atom to a chloride atom B) helps hold one water molecule to an adjacent one C) links oxygen to hydrogen atoms D) joins an amino acid to an adjacent amino acid E) joins nucleotide bases to one another

D) joins an amino acid to an adjacent amino acid