Macromolecules Quiz

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Macromolecule basics

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Sacred Cat

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Macromolecules Quiz


Macromolecules QuizVersion en ligne Macromolecule basics par Sacred Cat 1 1. Which four groups are the major biological macromolecules? a A. Vitamins, minerals, water, and proteins b B. Carbohydrates, lipids, proteins, and nucleic acids c C. Glucose, amino acids, fatty acids, and nucleotides d D. DNA, RNA, ATP, and glucose 2 2. What is the primary role of carbohydrates in many cells? a A. Storing genetic information b B. Providing readily available energy c C. Building DNA d D. Acting as antibodies only 3 3. What is the basic building block of carbohydrates? a A. Amino acid b B. Fatty acid c C. Monosaccharide d D. Nucleotide 4 4. Which molecule is a monosaccharide? a A. Starch b B. Cellulose c C. Glucose d D. Glycogen 5 5. Which carbohydrate is the primary storage form of glucose in plants? a Starch b Cellulose c Glycogen d Chitin 6 6. Which carbohydrate is primarily used for glucose storage in animals? a Starch b Cellulose c Chitin d Glycogen 7 7. What is the primary structural role of cellulose? a It provides structural support in plant cell walls. b It stores glucose in animals. c It catalyzes chemical reactions. d It stores genetic information. 8 8. What does the term "polysaccharide" mean? a A protein containing many amino acids b A carbohydrate containing one sugar unit c A carbohydrate made of many sugar units d A carbohydrate containing two sugar units 9 9. Which statement best demonstrates the relationship between carbohydrate structure and function? a Carbohydrate function is unrelated to structure. b All carbohydrates have identical structures and functions. c Different arrangements of sugar units allow carbohydrates to perform different functions. d Carbohydrates only function as enzymes. 10 10. Which macromolecule is especially important for long-term energy storage? a Nucleic acids b Carbohydrates c Proteins d Lipids 11 11. Which two components make up a typical triglyceride? a Amino acids and glycerol b Nucleotides and phosphate groups c Glucose and amino acids d Glycerol and fatty acids 12 12. Which type of lipid is a major component of cell membranes? a Phospholipids b Triglycerides c Glycogen d Cellulose 13 13. Why are phospholipids particularly suited for forming cell membranes? a They contain only amino acids. b They are made entirely of glucose. c They have both hydrophilic and hydrophobic regions. d They dissolve completely in water. 14 14. What does "hydrophobic" mean? a Able to break water molecules apart b Repelled by or poorly soluble in water c Made entirely of water d Attracted to water 15 15. What is the difference between saturated and unsaturated fatty acids? a Saturated fatty acids contain no carbon atoms. b Saturated fatty acids contain amino acids. c Unsaturated fatty acids contain nucleotides. d Unsaturated fatty acids contain one or more carbon-carbon double bonds. 16 16. Which macromolecule has the greatest diversity of functions in cells? a Nucleic acids b Carbohydrates c Lipids d Proteins 17 17. What are the monomers of proteins? a Monosaccharides b Fatty acids c Amino acids d Nucleotides 18 18. What part of an amino acid differs among the different amino acids? a The amino group b The carboxyl group c The R group d The central carbon 19 19. What bond links amino acids together in a protein? a Ionic bond b Glycosidic bond c Peptide bond d Hydrogen bond 20 20. Why can two proteins made from the same types of amino acids have different functions? a They can have the same structure but different functions. b They can have different amino acid sequences and therefore different structures. c Proteins never have different structures. d Protein function is unrelated to structure. 21 21. What can happen to a protein when it is exposed to extreme temperature or pH? a It can change shape and lose function. b It gains additional amino acids from the environment. c It automatically becomes DNA. d It becomes a carbohydrate. 22 22. Which protein function is represented by an enzyme? a Storing long-term energy b Catalyzing biochemical reactions c Forming glucose polymers d Storing hereditary information 23 23. What is an enzyme's substrate? a The enzyme after it is destroyed b The reactant that interacts with the enzyme c A type of nucleic acid d The cell membrane 24 24. What is the main effect of an enzyme on a biochemical reaction? a It changes the reaction into a different type of macromolecule. b It supplies all the energy in the cell. c It speeds up the reaction. d It permanently becomes the product. 25 25. Which macromolecule contains DNA and RNA? a Carbohydrates b Lipids c Proteins d Nucleic acids 26 26. What is the monomer of nucleic acids? a Amino acid b Nucleotide c Fatty acid d Monosaccharide 27 27. Which three components make up a nucleotide? a Amino group, carboxyl group, and R group b Glycerol, fatty acid, and phosphate c Sugar, phosphate group, and nitrogenous base d Glucose, fructose, and galactose 28 28. What is the primary function of DNA? a Long-term energy storage b Forming cell membranes c Digesting carbohydrates d Carrying genetic information 29 29. Which statement correctly describes RNA? a RNA is a protein enzyme. b RNA is a carbohydrate used to build cell walls. c RNA is a lipid used for long-term energy storage. d RNA is a nucleic acid involved in processes such as protein synthesis. 30 30. Which macromolecule contains the element nitrogen as an important part of its structure and is directly involved in genetic information? a Triglycerides b Lipids c Nucleic acids d Carbohydrates 31 31. What happens during dehydration synthesis? a Water is added to break a polymer apart. b DNA is converted into protein. c Enzymes are destroyed. d Water is released as smaller molecules are joined together. 32 32. What happens during hydrolysis? a Lipids are converted directly into DNA. b Amino acids are converted into nucleotides. c Water is removed while a polymer is formed. d Water is used to help break a bond in a larger molecule. 33 33. Which process is essentially the reverse of dehydration synthesis? a Hydrolysis b Cellular respiration c Diffusion d Photosynthesis 34 34. A student observes two glucose molecules joining together and a water molecule being produced. Which process occurred? a Denaturation b Hydrolysis c Dehydration synthesis d Diffusion 35 35. A digestive enzyme breaks a large carbohydrate into smaller sugar molecules by adding water. Which process is occurring? a Dehydration synthesis b DNA replication c Protein folding d Hydrolysis 36 36. Which example best demonstrates that structure determines function? a All proteins perform exactly the same function. b DNA and fats have identical structures. c All macromolecules have the same monomers. d Cellulose and starch are both made from glucose but have different structures and functions. 37 37. A mutation changes the amino acid sequence of a protein. Why could this affect the protein's function? a The mutation automatically changes the protein into DNA. b The changed sequence can affect the protein's structure and shape. c Amino acid sequences have no relationship to protein structure. d Proteins do not have specific structures. 38 38. Which pairing is correct? a Nucleic acids — cell membrane bilayer b Carbohydrates — genetic information c Proteins — DNA storage d Lipids – long-term energy storage 39 39. A cell needs a molecule that can act as a catalyst for a specific biochemical reaction. Which macromolecule would most likely perform this role? a Lipid b Carbohydrate c Protein d Nucleic acid 40 40. Which statement best summarizes the relationship between the four major macromolecules and cellular processes? a All four macromolecules perform exactly the same functions. b Only proteins have important cellular functions. c Each macromolecule has a structure that contributes to its specific roles in cells. d The structure of a macromolecule has little effect on its function. Feedback 1 Carbohydrates, lipids, proteins, and nucleic acids are the four major classes of biological macromolecules. 2 Carbohydrates, particularly glucose, are an important source of readily available cellular energy. 3 Carbohydrates are built from sugar units called monosaccharides. Multiple monosaccharides can join to form larger carbohydrates. 4 Glucose is a monosaccharide, meaning it consists of a single sugar unit. Starch, cellulose, and glycogen are polysaccharides made from many sugar units.

Macromolecules Quiz

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Macromolecules QuizVersion en ligne

par Sacred Cat

1. Which four groups are the major biological macromolecules?

2. What is the primary role of carbohydrates in many cells?

3. What is the basic building block of carbohydrates?

4. Which molecule is a monosaccharide?

5. Which carbohydrate is the primary storage form of glucose in plants?

6. Which carbohydrate is primarily used for glucose storage in animals?

7. What is the primary structural role of cellulose?

8. What does the term "polysaccharide" mean?

9. Which statement best demonstrates the relationship between carbohydrate structure and function?

10. Which macromolecule is especially important for long-term energy storage?

11. Which two components make up a typical triglyceride?

12. Which type of lipid is a major component of cell membranes?

13. Why are phospholipids particularly suited for forming cell membranes?

14. What does "hydrophobic" mean?

15. What is the difference between saturated and unsaturated fatty acids?

16. Which macromolecule has the greatest diversity of functions in cells?

17. What are the monomers of proteins?

18. What part of an amino acid differs among the different amino acids?

19. What bond links amino acids together in a protein?

20. Why can two proteins made from the same types of amino acids have different functions?

21. What can happen to a protein when it is exposed to extreme temperature or pH?

22. Which protein function is represented by an enzyme?

23. What is an enzyme's substrate?

24. What is the main effect of an enzyme on a biochemical reaction?

25. Which macromolecule contains DNA and RNA?

26. What is the monomer of nucleic acids?

27. Which three components make up a nucleotide?

28. What is the primary function of DNA?

29. Which statement correctly describes RNA?

30. Which macromolecule contains the element nitrogen as an important part of its structure and is directly involved in genetic information?

31. What happens during dehydration synthesis?

32. What happens during hydrolysis?

33. Which process is essentially the reverse of dehydration synthesis?

34. A student observes two glucose molecules joining together and a water molecule being produced. Which process occurred?

35. A digestive enzyme breaks a large carbohydrate into smaller sugar molecules by adding water. Which process is occurring?

36. Which example best demonstrates that structure determines function?

37. A mutation changes the amino acid sequence of a protein. Why could this affect the protein's function?

38. Which pairing is correct?

39. A cell needs a molecule that can act as a catalyst for a specific biochemical reaction. Which macromolecule would most likely perform this role?

40. Which statement best summarizes the relationship between the four major macromolecules and cellular processes?