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Beckers World of the Cell: chapter 3, Cell Biology Beckers World of the Cell Chapter 5

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Beckers World of the Cell: chapter 3, Cell Biology Beckers World of the Cell Chapter 5 Beckers World of the Cell: chapter 3, Cell Biology Beckers World of the Cell Chapter 5 Beckers World of the Cell: chapter 3, Cell Biology Beckers World of the Cell Chapter 5 Beckers World of the Ce...

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  • August 28, 2024
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  • Beckers World of the Cell: chapter 3, Cell Biolog
  • Beckers World of the Cell: chapter 3, Cell Biolog
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Beckers World of the Cell: chapter 3,
Cell Biology Beckers World of the Cell
Chapter 5
1) Which of the following is a nonpolar (hydrophobic) amino acid? - ANSWER A) valine

(valine is nonpolar and hydrophobic)

10) Based on the following amino acid sequence, which region(s) is/are hydrophobic?

1[K-K-N-Q] - 2[A-G-G-V] - 3[Y-C-S-R] - 4[H-E-C-Y]



A) region 2

B) region 4

C) region 1

D) region 3

E) both regions 1 and 3 - ANSWER A) region 2



(region 2: Alanin, Glycin, Valin: group A)

11) Which of the following is an example of a defensive protein?



A) keratin

B) cell surface receptor

C) antibody

D) myosin

E) hormone - ANSWER C) antibody

12) Cellulose belongs to which of the following groups of macromolecules? - ANSWER B)
carbohydrates

13) To which of the following classes of sugars does glucose belong? - ANSWER A) hexose



(hexa = 6)

14) Which of the following is a disaccharide? - ANSWER A) lactose



(lactose = galactose + glucose)

15) Which of the following is not a polysaccharide? - ANSWER D) extensin

, Beckers World of the Cell: chapter 3,
Cell Biology Beckers World of the Cell
Chapter 5

(extinsin = protein in cellwall)

16) Which of the following is not a characteristic of DNA? - ANSWER E) contains ribose

17) The chemical nature of each amino acid is determined by which of the following groups? -
ANSWER B) R

18) The nucleoside triphosphate molecules in DNA are linked together in the 5'→3' by a(n) ________
bridge. - ANSWER D) phosphodiester



(phosphodiester)

19) Which of the following is a purine?



A) cytosine

B) guanine

C) thymine

D) cysteine

E) uracil - ANSWER B) guanine



(purine: adenine and guanine)

(pyrimidines: thymine, uracil, cytosine)

(cysteine = amino acid)

2) Which of the following does not represent the correct pairing of the three-letter abbreviation with

the one-letter abbreviation of an amino acid? - ANSWER B) arg-A

(arginine = R)

(arginin blir arrrrrrrrg:-)

20) Fibrous proteins have extensive ________ structure, which allows them to be highly ordered and
repetitive. - ANSWER A) secondarya



(f.ex. keratin, collage, elastin)

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