An Informative Quiz On Basic Biochemistry

2.

This represents what biomacromolecules?
- Protein
- Lipid
- Carbohydrate
- Nucleic acid
Correct Answer

A. Protein

Explanation

if you don't recall the structure (amino acid), look at the elements: C, H, O, and N. that's protein.

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2
3.

Which would NOT be a correct match?
- Keratin - amino acid
- Phospholipid - fatty acid
- DNA - nucleotide
- Cellulase - monosaccharide
Correct Answer

A. Cellulase - monosaccharide

Explanation

this matches the example with the monomer. cellulASE is an enzyme, which is a protein. cellulOSE would be the carbohydrate.

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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?
- Protein
- Nucleic acid
- Carbohydrate
- Lipid
Correct Answer

A. Carbohydrate

Explanation

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.

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3
5.

A feature of nucleic acids not found in lipids is:
- Oxygen
- Potassium
- Phosphorus
- Hydrogen
Correct Answer

A. Phosphorus

Explanation

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 acids

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6.

Unlike saturated fatty acids, unsaturated fatty acids contain what kind of bonds between carbon atoms?
- Double
- Single
- Hydrogen
- Covalent
Correct Answer

A. Double

Explanation

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.

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7.

A biomacromolecule which consists of a polymer of fatty acids is a
- Nucleotide
- Lipid
- Carbohydrate
- Amino acid
Correct Answer

A. Lipid

Explanation

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.

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9
8.

Which are examples of carbohydrates?
- Starch, glucose, fructose
- Cellulose, glycogen, protease
- Cholesterol, wax, carcinogen
- Trypsin, lipase, testosterone
Correct Answer

A. Starch, glucose, fructose

Explanation

-ose is the classic suffix for a carbohydrate. starch is a polysaccharide made solely of glucose.

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9.

What is a function of lipids?
- Used as cell receptors, enzymes, and transport molecules in the human body.
- Used as the main energy source for plants.
- Stores hereditary information in bacteria.
- Used as insulation for marine arctic animals.
Correct Answer

A. 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).

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11
10.

Complete the analogy -lock : key :: enzyme : _________
- Substrate
- Active site
- Product
- Protein
Correct Answer

A. Substrate

Explanation

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.

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11.

An enzyme __________ the activation energy needed to achieve a chemical reaction.
- Stabilizes
- Raises
- Lowers
- Eliminates
Correct Answer

A. Lowers

Explanation

enzymes reduce the amount of energy needed but there will always be some activation energy required.

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11
12.

An appropriate enzyme to catalyze a reaction involving the imaginary substance camelsine would be ______________.
- Camelose
- Cameline
- Camelise
- Camelase
Correct Answer

A. Camelase

Explanation

enzymes are typically named after the substrate on which they act, and they typically end in -ase.

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10
13.

If you wanted to increase the rate of an enzyme-catalyzed reaction, what would you do?
- Decrease the amount of substrate by one-third
- Increase the pH by 4 levels on the pH scale
- Decrease the amount of enzyme by half
- Increase the temperature by 10 C
Correct Answer

A. Increase the temperature by 10 C

Explanation

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.

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12

An Informative Quiz On Basic Biochemistry

Which one is odd here?

Quiz Preview

This represents what biomacromolecules?

Which would NOT be a correct match?

If you wanted to get a lot of quick energy before a soccer match, which biomacromolecules would your body need to break down?

A feature of nucleic acids not found in lipids is:

Unlike saturated fatty acids, unsaturated fatty acids contain what kind of bonds between carbon atoms?

A biomacromolecule which consists of a polymer of fatty acids is a

Which are examples of carbohydrates?

What is a function of lipids?

Complete the analogy -lock : key :: enzyme : _________

An enzyme __________ the activation energy needed to achieve a chemical reaction.

An appropriate enzyme to catalyze a reaction involving the imaginary substance camelsine would be ______________.

If you wanted to increase the rate of an enzyme-catalyzed reaction, what would you do?