Biology Exam 1

Which monomers make up RNA? A. simple sugars B. polymers C. nucleotides D. amino acids

Neucleotides

What shape generally represents a sugar?

Pentagon

How are two nucleotides bonded together?

Phosphate groups and sugar base

Which Polymers are composed of amino acids?

Proteins

Which complex carbohydrate contains only a 1,4 glycosidic linkages? A. amylrose B. amylopectin C. glycogen D. cellulose

A

glucose + glucose ---- ____ by ___ A. maltose + water....dehydration synthesis B. starch + water...dehydration synthesis C. cellulose + water... hydrolysis D. lactose + water...hydrolysis E. sucrose + water...dehydration synthesis

A

Which of these is a polysaccharide? A. galactose B. cellulose C. sucrose D. glucose E. lactose

B

Which polysaccharide contains a modified monosaccharide? A. cellulose B. peptidoglycan C. starch D. glycogen

B

Which statement is true of polymers? A. their synthesis generally consumers water B. they are always made of monomers C. they are always made by condensation reactions D. none of the above

B

___ is the most abundant organic compound Earth A. starch B. cellulose C. glucose D. lactose E. glycogen

B

Cellulose is... A. the third most abundant organic compound in the world B. branching polymer C. made with glucose that has the beta ring form D. a component of crab shells E. all of the above

C

Which of the following is not attached to the central carbon atom in an amino acid? A. an amino functional group B. a carboxyl functional group C. an oxygen D. a side chain

C

Which part of an amino acid is always acidic? A. amino functional group B. side chain C. carboxyl functional group D. none of the above

C

Glycogen is ____ A. the form in which plants store sugars B. a transport protein that carries oxygen C. a polysaccharide found in plant cell walls D. a polysaccharide found in animals E. a source of saturated fat

D

Polymers that contain sugars... A. may store hereditary information B. may store energy C. may protect cells D. both B and C E. A, B and C

D

Which of the following complex carbohydrates is listed with its correct function? A. amylose: main component of plant starch B. chitin: constituent of bacterial cell walls C. starch: primary energy-storage molecule in animals D. cellulose: structural component of plant cell walls

D

Which of the following statements about monosaccharide structure is true? A. all monosaccharides contain carbon, hydrogen, oxygen, and nitrogen atoms B. aldoses and ketoses differ in the position of their hydroxyl groups C. a six-carbon sugar is called pentose D. monsaccharides can be classified according to the spatial arrangement of their atoms

D

Which of the following statements about the foundation of polypeptides from amino acids is true? A. polypeptides form by condensation or hydrolysis reactions B. the reaction occurs through the addition of a water molecule to amino acids C. a bond can form between any carbon and nitrogen atom in the amino acids being joined D. a bond forms between the carboxyl functional group of one amino acid and the amino functional group of the other amino acid

D

True or false? Peptidoglycan is a polysaccharide found only in bacteria

True