Quiz: Biology Questions On Biomolecules
Take a look at this awesome and fun quiz that is based on biology questions on Biomolecules. Have you studied biomolecules? Do you think you have a good understanding of it? If yes, then you can easily crack this quiz. Here, we'll ask you a few simple questions about biomolecules and if you want to score maximum marks, you've to give the correct answers to all the questions. If you hit more than 70% it means that you are really good at this subject.
Best of luck!
Questions and Answers
- 1.
Which is an amino acid?
- A.
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- B.
![Quiz: Biology Questions On Biomolecules - Quiz]()
- C.
![Quiz: Biology Questions On Biomolecules - Quiz]()
- D.
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Correct Answer
B.Explanation
B is correct. A is glucose, a monosaccharide. C is glycerol, one of the compounds that make triglyceride (which is a polymer of lipid when glycerol is bound with fatty acids). D is a nucleotide (phosphate group, sugar denoted by the pink pentagon, nitrogeneous base indicated by the blue shapes).Rate this question:
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- 2.
Select the 6 essential elements.
- A.
F
- B.
S
- C.
C
- D.
K
- E.
O
- F.
P
- G.
N
- H.
Na
- I.
Fe
- J.
H
Correct Answer(s)
B. S
C. C
E. O
F. P
G. N
J. HExplanation
C H O N P SRate this question:
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- 3.
Which elements are in carbohydrates?
- A.
F
- B.
C
- C.
Si
- D.
O
- E.
H
- F.
N
- G.
P
Correct Answer(s)
B. C
D. O
E. HExplanation
Carbon, hydrogen, and oxygen. Remember your glucose molecule!Rate this question:
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- 4.
Which elements are in nucleotides (nucleic acids)?
- A.
C
- B.
H
- C.
O
- D.
N
- E.
P
- F.
S
Correct Answer(s)
A. C
B. H
C. O
D. N
E. PExplanation
A nucleotide (the monomer of the nucleic acid polymer) is made up of three parts: the phosphate group, the sugar, and the nitrogenous base. Phosphate group: P, O Sugar: C, H, O (remember glucose?) Nitrogenous base: N, and other elementsRate this question:
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- 5.
Which elements are in proteins?
- A.
C
- B.
H
- C.
O
- D.
N
- E.
P
- F.
S
Correct Answer(s)
A. C
B. H
C. O
D. N
F. SExplanation
Structure of amino acid is a carbon bonded to a hydrogen, a carboxyl group (the part that makes it acidic, the COOH), an amino group (the part with the N), and an R group (the biology equivalent of the algebraic x). A lot of R groups contain S.
C H O N SRate this question:
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- 6.
Which elements are in lipids?
- A.
Carbon
- B.
Hydrogen
- C.
Oxygen
- D.
N
- E.
P
- F.
S
Correct Answer(s)
A. Carbon
B. Hydrogen
C. OxygenExplanation
Lipids are organic molecules that are insoluble in water and soluble in nonpolar solvents. They are composed mainly of carbon, hydrogen, and oxygen atoms. These elements are essential components of the fatty acids and glycerol molecules that make up lipids. Nitrogen (N), phosphorus (P), and sulfur (S) are not typically found in lipids, making them incorrect choices for this question.Rate this question:
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- 7.
The following are inorganic molecules:
- A.
CH2CH
- B.
CO2
- C.
HCH
- D.
NH2CHCH3COOH
Correct Answer
B. CO2Explanation
Definition of organic molecule: has C-H bonds Definition of inorganic molecule: does NOT have C-H bondsRate this question:
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- 8.
Polymers of the following types of compounds are made by dehydration synthesis:
- A.
Proteins
- B.
Lipids
- C.
Nucleic Acids
- D.
Carbohydrates
Correct Answer(s)
A. Proteins
B. Lipids
C. Nucleic Acids
D. CarbohydratesExplanation
All of the organic compounds that you guys have covered are formed by dehydration synthesis. Remember that in order for their to be attraction between the monomers, the monomers need to lose some atoms in order to have a charge. The lost atoms combine together as water, thereby "dehydrating" the monomers.Rate this question:
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- 9.
What is the relation of hydrolysis to dehydration synthesis?
- A.
Adds water to break the bonds formed from dehydration synthesis.
- B.
Unrelated
- C.
Takes out additional water.
Correct Answer
A. Adds water to break the bonds formed from dehydration synthesis.Explanation
Hydrolysis is the process of breaking down molecules by adding water. Dehydration synthesis, on the other hand, is the process of building larger molecules by removing water. The correct answer states that hydrolysis adds water to break the bonds formed from dehydration synthesis. This means that hydrolysis is the reverse of dehydration synthesis, as it breaks down the bonds that were formed during dehydration synthesis by adding water. Therefore, the correct answer accurately describes the relation between hydrolysis and dehydration synthesis.Rate this question:
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- 10.
Which of the following are monosaccharides?
- A.
Maltose
- B.
Glucose
- C.
Fructose
- D.
Sucrose
- E.
Lactose
- F.
Galactose
- G.
Glycerol
- H.
Aminase
Correct Answer(s)
B. Glucose
C. Fructose
F. GalactoseExplanation
The monosaccharides are glucose, fructose, and galactose. Monosaccharides are simple sugars that cannot be broken down further into smaller sugar molecules. Maltose, sucrose, and lactose are disaccharides, which are composed of two monosaccharide units. Glycerol is a type of alcohol and a component of triglycerides, while aminase is not a sugar molecule. Therefore, glucose, fructose, and galactose are the only monosaccharides listed.Rate this question:
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- 11.
What is maltose?
- A.
Monosaccharide
- B.
Disaccharide
Correct Answer
B. DisaccharideExplanation
Maltose is a disaccharide, which means it is composed of two monosaccharide units. Specifically, maltose is made up of two glucose molecules linked together. This makes it a type of sugar that is commonly found in grains, such as barley and malted barley. It is often used in brewing and baking processes, as well as in the production of certain food products.Rate this question:
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- 12.
What type of a biomolecule is an enzyme?
- A.
Lipid
- B.
Nucleic Acid
- C.
Protein
- D.
Carbohydrate
Correct Answer
C. ProteinExplanation
Enzymes are a type of protein biomolecule. Proteins are made up of long chains of amino acids and enzymes are a specific type of protein that act as catalysts in biochemical reactions. They speed up the rate of these reactions by lowering the activation energy required for the reaction to occur. Enzymes are essential for many biological processes and play a crucial role in metabolism, digestion, and other cellular functions.Rate this question:
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- 13.
What are the factors affecting enzyme activity?
- A.
PH, temperature, substrate concentration in a narrow range
- B.
PH, temperature, substrate concentration in a broad range
- C.
PH, temperature only in a narrow range
- D.
PH, temperature only in a broad range
Correct Answer
A. PH, temperature, substrate concentration in a narrow rangeExplanation
Remember that enzymes work because they have specific shapes. Altering the shape alters how well they work. Changing pH and changing temperature can deform the enzyme and make it more difficult for the enzyme to work.
Enzyme function can also be affected by substrate concentration, however (where substrate concentration refers to how much substrate there is in a given volume). Take for instance if there are 4 enzymes and 4 substrates. Maximum efficiency is achieved because each enzyme has a substrate to act on. If you reduce the amount of substrate to 2 substrates, there's only half efficiency.
These factors act in a narrow range. What does this mean? Enzyme activity only has a narrow range of activity. Past a certain point, changing the factor won't have an effect. For instance, too high of a temperature deforms the enzyme. Past a certain temperature, the enzyme can't be deformed any more than it already is. With substrate concentration, take again the example of having 4 enzymes. Increasing the number of substrates to 5 or more wouldn't have much of an effect because there are only 4 enzymes.Rate this question:
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- 14.
What is glycogen?
- A.
Monosaccharide
- B.
Disaccharide
- C.
Polysaccharide
- D.
Polypeptide
- E.
Lipid
- F.
Nucleic acid
Correct Answer
C. PolysaccharideExplanation
Glycogen is the polysaccharide found in mammals.
Cellulose and starch are the polysaccharides found in plants.Rate this question:
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- 15.
What type of bonds occur in organic compounds?
- A.
Ionic bonds
- B.
Covalent bonds
- C.
Metallic bonds
Correct Answer
B. Covalent bondsExplanation
Covalent bonds occur in organic compounds. These bonds involve the sharing of electrons between atoms, resulting in the formation of stable molecules. In organic compounds, carbon is the central element, and it forms covalent bonds with other elements like hydrogen, oxygen, nitrogen, and sulfur. This sharing of electrons allows organic compounds to have a wide range of structures and properties, making them essential for life processes and the basis of organic chemistry.Rate this question:
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- 16.
Select the four nitrogen bases.
- A.
Uranine
- B.
Adenine
- C.
Guanine
- D.
Cryonine
- E.
Thymine
- F.
Hexanine
- G.
Pentanine
- H.
Cytosine
Correct Answer(s)
B. Adenine
C. Guanine
E. Thymine
H. CytosineExplanation
The four nitrogen bases in DNA are Adenine, Guanine, Thymine, and Cytosine. These bases are the building blocks of DNA and are responsible for carrying the genetic information. Uranine, Cryonine, Hexanine, and Pentanine are not nitrogen bases found in DNA.Rate this question:
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- 17.
The bonds between amino acids are called ________ bonds.
Correct Answer(s)
peptideExplanation
The bonds between amino acids are called peptide bonds. Peptide bonds are formed through a condensation reaction between the carboxyl group of one amino acid and the amino group of another amino acid. These bonds are crucial for the formation of proteins, as they link the individual amino acids together to create a polypeptide chain.Rate this question:
- 18.
Lipids make good cell membranes because they are _________ in water.
Correct Answer(s)
insolubleExplanation
Lipids make good cell membranes because they are insoluble in water. This is because lipids are hydrophobic, meaning they repel water. The structure of lipids, with their long hydrocarbon chains, prevents them from interacting with water molecules. This property allows lipids to form a stable barrier that separates the inside and outside of the cell, protecting its contents.Rate this question:
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