An Informative Quiz On Basic Biochemistry
Living organisms have a lot of chemicals and elements within them, and studying biochemistry is one way of opening ourselves to this. If you have just begun studying biochemistry, the informative quiz below on basic biochemistry is perfect for testing out what you know. Give it a try and see what you should read up on.
- 1.
Which one is odd here?
- A.
Nucleic acid
- B.
Monosaccharides
- C.
Lipid
- D.
Protein
Correct Answer
B. MonosaccharidesExplanation
a monosaccharide is a monomer; all the rest are polymersRate this question:
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- 2.
This represents what biomacromolecules?
- A.
Protein
- B.
Lipid
- C.
Carbohydrate
- D.
Nucleic acid
Correct Answer
A. ProteinExplanation
if you don't recall the structure (amino acid), look at the elements: C, H, O, and N. that's protein.Rate this question:
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- 3.
Which would NOT be a correct match?
- A.
Keratin - amino acid
- B.
Phospholipid - fatty acid
- C.
DNA - nucleotide
- D.
Cellulase - monosaccharide
Correct Answer
D. Cellulase - monosaccharideExplanation
this matches the example with the monomer. cellulASE is an enzyme, which is a protein. cellulOSE would be the carbohydrate.Rate this question:
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- 4.
If you wanted to get a lot of quick energy before a soccer match, which biomacromolecules would your body need to break down?
- A.
Protein
- B.
Nucleic acid
- C.
Carbohydrate
- D.
Lipid
Correct Answer
C. CarbohydrateExplanation
Carbohydrates are the primary source of quick energy for the body, as they are rapidly broken down into glucose, which can be readily used by cells for energy production during high-intensity activities like a soccer match.Rate this question:
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- 5.
A feature of nucleic acids not found in lipids is:
- A.
Oxygen
- B.
Potassium
- C.
Phosphorus
- D.
Hydrogen
Correct Answer
C. PhosphorusExplanation
Nucleic acids, such as DNA and RNA, contain phosphorus as a key component of their structure, specifically in the phosphate groups that link nucleotide units together. Phosphorus is not a typical component of lipids. Lipids primarily consist of carbon, hydrogen, and oxygen, with some lipids containing sulfur in addition to these elements. While nucleic acids contain phosphorus, lipids do not, making phosphorus a distinguishing feature of nucleic acidsRate this question:
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- 6.
Unlike saturated fatty acids, unsaturated fatty acids contain what kind of bonds between carbon atoms?
- A.
Double
- B.
Single
- C.
Hydrogen
- D.
Covalent
Correct Answer
A. DoubleExplanation
the bonds between atoms in both saturated and unsaturated are covalent. hydrogen bonds occur between atoms of different molecules. both have single bonds, but only unsaturated fatty acids have DOUBLE bonds, thus providing more space in between hydrogen atoms so the lipid can move more. this is why unsaturated fats are liquid at room temperature.Rate this question:
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- 7.
A biomacromolecule which consists of a polymer of fatty acids is a
- A.
Nucleotide
- B.
Lipid
- C.
Carbohydrate
- D.
Amino acid
Correct Answer
B. LipidExplanation
two of these (nucleotide and amino acids) are monomers, so that limits the answer choices. lipids are made of fatty acids and carbohydrates are made of monosaccharides.Rate this question:
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- 8.
Which are examples of carbohydrates?
- A.
Starch, glucose, fructose
- B.
Cellulose, glycogen, protease
- C.
Cholesterol, wax, carcinogen
- D.
Trypsin, lipase, testosterone
Correct Answer
A. Starch, glucose, fructoseExplanation
-ose is the classic suffix for a carbohydrate. starch is a polysaccharide made solely of glucose.Rate this question:
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- 9.
What is a function of lipids?
- A.
Used as cell receptors, enzymes, and transport molecules in the human body.
- B.
Used as the main energy source for plants.
- C.
Stores hereditary information in bacteria.
- D.
Used as insulation for marine arctic animals.
Correct Answer
D. Used as insulation for marine arctic animals.Explanation
don't let the organism stuff at the end confuse you - that's just specific information used as examples. lipids provide insulation for organisms, no matter what kind they are. they also store energy but are not the main source of energy (this is carbohydrates).Rate this question:
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- 10.
Complete the analogy -lock : key :: enzyme : _________
- A.
Substrate
- B.
Active site
- C.
Product
- D.
Protein
Correct Answer
A. SubstrateExplanation
although "induced fit" is the best model now, the enzyme and substrate fit together like puzzle pieces, or like a lock and key. the enzyme is the lock, while the substrate is the key.Rate this question:
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- 11.
An enzyme __________ the activation energy needed to achieve a chemical reaction.
- A.
Stabilizes
- B.
Raises
- C.
Lowers
- D.
Eliminates
Correct Answer
C. LowersExplanation
enzymes reduce the amount of energy needed but there will always be some activation energy required.Rate this question:
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- 12.
An appropriate enzyme to catalyze a reaction involving the imaginary substance camelsine would be ______________.
- A.
Camelose
- B.
Cameline
- C.
Camelise
- D.
Camelase
Correct Answer
D. CamelaseExplanation
enzymes are typically named after the substrate on which they act, and they typically end in -ase.Rate this question:
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- 13.
If you wanted to increase the rate of an enzyme-catalyzed reaction, what would you do?
- A.
Decrease the amount of substrate by one-third
- B.
Increase the pH by 4 levels on the pH scale
- C.
Decrease the amount of enzyme by half
- D.
Increase the temperature by 10 C
Correct Answer
D. Increase the temperature by 10 CExplanation
Increasing the temperature typically increases the rate of enzyme-catalyzed reactions up to a certain point. This is because higher temperatures provide more kinetic energy to the reacting molecules, leading to more frequent collisions and a higher likelihood of successful interactions between the enzyme and substrate. However, it's important to note that excessively high temperatures can denature enzymes, leading to a decrease in reaction rate or complete loss of enzyme activity. Therefore, while increasing the temperature can enhance reaction rates, it should be done within a suitable temperature range for the specific enzyme being used.Rate this question:
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Quiz Review Timeline +
Our quizzes are rigorously reviewed, monitored and continuously updated by our expert board to maintain accuracy, relevance, and timeliness.
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Current Version
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Mar 13, 2024Quiz Edited by
ProProfs Editorial Team -
Sep 19, 2010Quiz Created by
Smachel
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