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Biology
11th
grade
Biology Exam 2 Review - Biomolecules, Enzymes + Homeostasis
45 questions
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- 1. Multiple Choice
Which of the following is a characteristic of carbohydrates?
Provides structure for cells
Provides energy for all cellular activities
Contain complex carbohydrates known as starches
All of the above
- 2. Multiple Choice
Which of the following is a characteristic of protein?
Made up of amino acids and regulate cellular processes
Fats, oils, and waxes
Complex carbohydrates known as starches
DNA and RNA
- 3. Multiple Choice
Which biomolecule is helpful for long term energy storage?
Nucleic acid
Protein
Carbohydrate
Lipid
- 4. Multiple Choice
Which biomolecule is useful for a fast source of energy?
Lipid
Nucleic acid
Protein
Carbohydrate
- 5. Multiple Choice
Which biomolecule is important for insulation?
Lipid
Proteins
Carbohydrates
Nucleic acid
- 6. Multiple Choice
What is the monomer for proteins?
Amino acid
Nucleotide
Fatty acid
Monosaccharide
- 7. Multiple Choice
Which monomer makes up nucleic acids?
Amino acid
Nucleotide
Fatty acid
Monosaccharide
- 8. Multiple Choice
What is the monomer for carbohydrates?
Amino acid
Nucleotide
Fatty acid
Monosaccharide
- 9. Multiple Choice
Which monomer makes up lipids?
Amino acid
Nucleotide
Fatty acid
Monosaccharide
- 10. Multiple Choice
You test three unknown foods for sugars, complex sugars (starches) lipids, and proteins. Given the results in the table, which monomer would you expect to find in unknown #1
monosaccharide
nucleotide
triglyceride
amino acids
- 11. Multiple Choice
You test three unknown foods for sugars, complex sugars (starches) lipids, and proteins. Given the results in the table, which monomer would you expect to find in unknown #2
monosaccharides
nucleotides
triglycerides
amino acids
- 12. Multiple Choice
You test three unknown foods for sugars, complex sugars (starches) lipids, and proteins. Given the results in the table, which monomer would you expect to find in unknown #3
monosaccharides
nucleotides
triglycerides
amino acids
- 13. Multiple Choice
Enzymes are an example of
Lipids
Carbohydrate
Protein
Nucleic Acid
- 14. Multiple ChoiceWhat is the purpose of an enzyme?give permission for the reactionraise activation energyspeed up reactionscontrol how many reactions occur
- 15. Multiple ChoiceEnzymes are capable of increasing the rate of a chemical reaction within a living cell. Enzymes accomplish this through which of the following means?reducing the number of productsreducing the activation energyincreasing the temperature of the cellincreasing the concentration of reactants
- 16. Multiple ChoiceWhat 3 letters do enzymes typically end in?-ose-ase-ese-tic
- 17. Multiple ChoiceAny substance that is acted upon by an enzyme is called a(n)?CoenzymeSubstrateVitaminPolypeptide
- 18. Multiple ChoiceAfter the enzyme and substrate bind together and perform the reaction, what does the substrate become?a substratean enzymea productan active site
- 19. Multiple ChoiceLetter D...active siteenzymesubstrateproducts
- 20. Multiple ChoiceLetter B...active siteenzymesubstrateproducts
- 21. Multiple ChoiceLetter C...active siteenzymessubstrateproducts
- 22. Multiple ChoiceLetter E...active siteenzymesubstrateproducts
- 23. Multiple ChoiceEnzymes provide a site where reactants called substrates can be brought together in an enzyme-catalyzed reaction. The site is called theenzyme substrate complex.reaction site.active site.lock and key.
- 24. Multiple ChoiceAn enzyme speeds up a reaction bylowering the activation energy.raising the activation energy.releasing energy.absorbing energy.
- 25. Multiple ChoiceWhich of the following conclusions can be drawn from this graph?The optimum pH of the enzyme is 6.6.The optimum pH of the enzyme is 5.8The enzyme’s activity increases as pH increases 5.0 to 9.0The enzyme’s activity is greater around pH of 8.0 .
- 26. Multiple Choice
What is the optimal pH of enzyme A?
8
2
5.7-10
10
- 27. Multiple Choice
Which of the following best explains why enzymes are necessary for reactions in our cells?
The reactions are too slow to meet the needs of the cell if enzymes are missing.
Enzymes supply the oxygen necessary for the reactions.
Enzymes change reactants from solid to liquid during the reactions.
The reactions take up too much space in the cell if enzymes are missing.
- 28. Multiple Choice
Changes in pH and temperature can denature an enzyme which causes it to __________________ and affects its function.
puncture
lose its shape
double in size
get smaller
- 29. Multiple ChoiceWhat happens when enzymes are heated to a high temperature?The enzymes die.The shapes of the enzyme are altered denatureThe enzymes' amino acid sequence changes.The enzymes remain the same
- 30. Multiple Choice
Cells can only work if their enzymes are functioning. What can you infer from the graph?
Cells function best at low pH values
Cells function fine at all pH values
Cells function best at high pH values
Cells do not function well if the pH is too high or too low
- 31. Multiple Choice
Which two systems work together to maintain homeostasis while transporting oxygen throughout the body and removing carbon dioxide?
circulatory and respiratory
respiratory and excretory
circulatory and digestive
respiratory and digestive
- 32. Multiple Choice
Which of the following is not regulated by homeostasis?
body temperature
blood sugar
blood pH
body movements
- 33. Multiple Choice
What is an example of a positive feedback mechanism?
- 34. Multiple ChoiceThe two types of feedback systems that help organisms maintain homeostasis are:positive and negativereceptor and effectorstatic and dynamicminor and major
- 35. Multiple ChoiceMaintaining body temperature is an example of a:negative feedback looppositive feedback loop
- 36. Multiple ChoiceRapid growth during puberty causes your body to release more and more growth hormones. As you grow, more and more growth hormones are released until puberty is reached, and then the hormones stop.Positive Feedback ResponseNegative Feedback Loop
- 37. Multiple ChoiceIf the calcium in your blood decreases below homeostasis levels, a gland in the brain will sense the decrease and send a chemical message to your bones. Your bones will release calcium into the blood, bringing blood calcium levels back up.Positive Feedback ResponseNegative Feedback Loop
- 38. Multiple ChoiceWhen glucose levels in the blood rise, your brain sends a signal to your pancreas. The pancreas releases insulin, which opens channels in cell membranes to allow glucose to enter the cell, lowering blood sugar levels.Positive Feedback ResponseNegative Feedback Loop
- 39. Multiple Choice
Homeostasis
allows for a wildly fluctuating internal environment
is impossible in vertebrates
is the maintenance of a relatively stable internal environment and often incorporates a form of feedback regulation
- 40. Multiple ChoiceWhen you get cut, your skin cells release hormones that signal platelets to come and stop the bleeding. Platelets then release more hormones that signal even more platelets to help stop bleeding. The hormone signals continue until the cut is closed.Positive Feedback ResponseNegative Feedback Loop
- 41. Multiple Choice
Cystic fibrosis is a genetic disease that causes extra mucus to block a person’s airways like the trachea, bronchi and lungs. What system is affected by cystic fibrosis?
reproductive
cardiovascular
respiratory
nervous
- 42. Multiple Choice
Which body system includes organs like the brain, nerves, and spinal cord?
digestive
urinary
endocrine
nervous
- 43. Multiple Choice
Which body system breaks down food and absorbs nutrients?
cardiovascular
digestive
endocrine
muscular
- 44. Multiple Choice
When our body temperature gets too hot, our skin produces sweat to cool us down. What type of feedback mechanism does this describe?
positive feedback
negative feedback
- 45. Multiple Choice
When we get a cut or a scrape on our skin, our body continually releases cells called platelets to heal the wound and prevent us from bleeding out. What type of feedback mechanism does this describe?
positive feedback
negative feedback
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