Bio 103 5th Chapter

11 Questions | By Faresbanyyounis | Last updated: Mar 21, 2022 | Total Attempts: 142

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1.

Which of the following categories includes all others in the list ?
- A.
  
  Disaccharide
- B.
  
  Polysaccharide
- C.
  
  Starch
- D.
  
  Carbohydrate
2.

Which of the following is true of unsaturated fats ?
- A.
  
  They are more common in animals than in plant
- B.
  
  They have double bonds in their fatty-acid chains
- C.
  
  They generally solidify at room temperature
- D.
  
  Two answers are correct
3.

Enzyme that break down DNA catalyze the hydrolysis of the covalent bonds that join uncleotides together .What would happen to DNA molecule treated with these enzymes ?
- A.
  
  The two strands of the double helix would separate
- B.
  
  The phosphodiester linkage of the polynucleotide backbone would be broken
- C.
  
  The pyrimidine would be separated from the deoxyribose sugars
- D.
  
  All bases would be separated from the deoxyribose sugars
4.

Which of the following is a sugar?
- A.
  
  C5H12O6
- B.
  
  C8H16O16
- C.
  
  C4H8O4
- D.
  
  C12H12O12
5.

Which of the following pairs of base sequences could form a short stretch of a normal double helix of DNA?
- A.
  
  5' -AGCT- 3' with 5' -TCGA- 3'
- B.
  
  5' -GCGC- 3' with 5' -ATAT- 3'
- C.
  
  5' -ATGC- 3' with 5'-GCAT-3'
- D.
  
  All the above
6.

What is the reaction that break down the molecules by adding a water molecule ?
- A.
  
  Hydrolysis
- B.
  
  Dehydration
- C.
  
  Polymerization
- D.
  
  All the above
7.

A sugar with the molecular formula C6H12O6 .what would be the molecular formula for a polymer made by linking 10 of this sugar by dehydration reactions?
- A.
  
  C60H120O60
- B.
  
  C60H102O51
- C.
  
  C60H100O50
- D.
  
  C60H111O51
8.

Which of the following types of lipid consist of: 3 fatty acids + glycerol
- A.
  
  Fats
- B.
  
  Phosphlipids
- C.
  
  Stroid
- D.
  
  Non of the above
9.

Which of the following can't digest by animal enzyme ?
- A.
  
  Chitin
- B.
  
  Cellulose
- C.
  
  Starch
- D.
  
  Glycogen
10.

Which level of protein structure do the alpha helix and bata pleated sheet represent ?
- A.
  
  Primary
- B.
  
  Secondary
- C.
  
  Tertiary
- D.
  
  Quaternary
- E.
  
  All the above
11.

To which carbon does the phosphate group linked ?
- A.
  
  3
- B.
  
  5
- C.
  
  1
- D.
  
  6

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