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Biological Molecules MDCAT MCQs with Answers

Biological Molecules MCQs

Welcome to the Biological Molecules MDCAT MCQs with Answers. In this post, we have shared Biological Molecules Multiple Choice Questions and Answers for PMC MDCAT 2024. Each question in MDCAT Biology offers a chance to enhance your knowledge regarding Biological Molecules MCQs in this MDCAT Online Test.

Which type of biological molecule includes enzymes and antibodies?
a) Carbohydrates
b) Lipids
c) Proteins
d) Nucleic acids

Answer
c) Proteins

What is the primary function of carbohydrates in animals?
a) Genetic information storage
b) Long-term energy storage
c) Immediate energy supply
d) Structural support

Answer
c) Immediate energy supply

Which molecule is known for its role in storing and transmitting genetic information?
a) Carbohydrates
b) Proteins
c) Lipids
d) Nucleic acids

Answer
d) Nucleic acids

What type of bond connects the monomers in a carbohydrate chain?
a) Hydrogen bond
b) Ionic bond
c) Glycosidic bond
d) Peptide bond

Answer
c) Glycosidic bond

Which of the following is a major component of the cell membrane?
a) Proteins
b) Carbohydrates
c) Nucleic acids
d) Lipids

Answer
d) Lipids

What is the monomer unit of proteins?
a) Nucleotide
b) Amino acid
c) Monosaccharide
d) Fatty acid

Answer
b) Amino acid

Which type of biological molecule is characterized by a hydrophobic nature?
a) Carbohydrates
b) Proteins
c) Lipids
d) Nucleic acids

Answer
c) Lipids

Which of the following is a polysaccharide?
a) Glucose
b) Sucrose
c) Glycogen
d) Fructose

Answer
c) Glycogen

Which type of biological molecule includes enzymes that speed up chemical reactions?
a) Carbohydrates
b) Proteins
c) Lipids
d) Nucleic acids

Answer
b) Proteins

What is the basic unit of nucleic acids?
a) Monosaccharide
b) Amino acid
c) Nucleotide
d) Fatty acid

Answer
c) Nucleotide

Which molecule provides the main source of energy for cellular activities?
a) Carbohydrates
b) Lipids
c) Proteins
d) Nucleic acids

Answer
a) Carbohydrates

What is the function of lipids in cells?
a) Store genetic information
b) Provide energy and form cell membranes
c) Act as enzymes
d) Store and transport nutrients

Answer
b) Provide energy and form cell membranes

Which type of carbohydrate is known as a simple sugar?
a) Polysaccharide
b) Disaccharide
c) Monosaccharide
d) Glycogen

Answer
c) Monosaccharide

Which of the following is a component of RNA but not DNA?
a) Thymine
b) Uracil
c) Deoxyribose
d) Ribose

Answer
b) Uracil

What type of lipid is found in cell membranes and helps form the lipid bilayer?
a) Triglycerides
b) Phospholipids
c) Steroids
d) Waxes

Answer
b) Phospholipids

Which biological molecule contains the genetic code for protein synthesis?
a) Proteins
b) Carbohydrates
c) Lipids
d) Nucleic acids

Answer
d) Nucleic acids

Which of the following is an example of a structural protein?
a) Insulin
b) Hemoglobin
c) Collagen
d) Enzyme

Answer
c) Collagen

What type of bond holds together the fatty acids and glycerol in triglycerides?
a) Hydrogen bond
b) Ionic bond
c) Ester bond
d) Peptide bond

Answer
c) Ester bond

Which of the following is a function of proteins in the body?
a) Store energy
b) Provide structural support
c) Store genetic information
d) Serve as signaling molecules

Answer
b) Provide structural support

What is the role of nucleotides in nucleic acids?
a) Energy storage
b) Structural support
c) Genetic information storage
d) Enzyme activity

Answer
c) Genetic information storage

Which type of biological molecule is used for quick energy release in cells?
a) Carbohydrates
b) Lipids
c) Proteins
d) Nucleic acids

Answer
a) Carbohydrates

What is the primary structure of a protein determined by?
a) The sequence of nucleotides
b) The sequence of amino acids
c) The folding pattern of the polypeptide chain
d) The bonding between amino acids

Answer
b) The sequence of amino acids

Which of the following is not a function of carbohydrates?
a) Immediate energy supply
b) Long-term energy storage
c) Genetic information storage
d) Structural support

Answer
c) Genetic information storage

What is the function of triglycerides in the body?
a) Store genetic information
b) Provide energy and insulation
c) Act as catalysts
d) Transport nutrients

Answer
b) Provide energy and insulation

Which component of nucleotides varies between different nucleic acids?
a) Phosphate group
b) Sugar molecule
c) Nitrogenous base
d) Amino group

Answer
c) Nitrogenous base

What is the role of enzymes in metabolic reactions?
a) Speed up reactions
b) Provide structural support
c) Store genetic information
d) Transport substances

Answer
a) Speed up reactions

Which of the following is a characteristic of saturated fatty acids?
a) Contains double bonds
b) Liquid at room temperature
c) Found in animal fats
d) Contains only single bonds

Answer
c) Found in animal fats

What type of biological molecule is glycogen?
a) Protein
b) Carbohydrate
c) Lipid
d) Nucleic acid

Answer
b) Carbohydrate

Which molecule is known for its role in the synthesis of proteins?
a) DNA
b) RNA
c) ATP
d) Lipids

Answer
b) RNA

What is the main function of lipids in the cell membrane?
a) Energy storage
b) Provide structural support
c) Form a barrier to separate cell contents from the environment
d) Store genetic information

Answer
c) Form a barrier to separate cell contents from the environment

Which of the following is an example of a disaccharide?
a) Sucrose
b) Cellulose
c) Starch
d) Glycogen

Answer
a) Sucrose

Which type of biological molecule is characterized by having a hydrophilic “head” and a hydrophobic “tail”?
a) Carbohydrates
b) Proteins
c) Nucleic acids
d) Phospholipids

Answer
d) Phospholipids

Which biological molecule is composed of long chains of nucleotides?
a) Proteins
b) Carbohydrates
c) Nucleic acids
d) Lipids

Answer
c) Nucleic acids

Which class of biological molecules includes enzymes, antibodies, and hormones?
a) Carbohydrates
b) Proteins
c) Lipids
d) Nucleic acids

Answer
b) Proteins

Which component of an amino acid varies between different amino acids?
a) Amino group
b) Carboxyl group
c) Hydrogen atom
d) R group (side chain)

Answer
d) R group (side chain)

Which type of biological molecule is primarily used for energy storage in plants?
a) Starch
b) Glycogen
c) Cellulose
d) Chitin

Answer
a) Starch

What is the main role of cellulose in plants?
a) Store energy
b) Provide structural support
c) Act as a catalyst
d) Transport nutrients

Answer
b) Provide structural support

Which biological molecule is involved in the energy transfer within cells?
a) Carbohydrates
b) ATP
c) Lipids
d) Proteins

Answer
b) ATP

Which of the following is a property of enzymes?
a) They are consumed in reactions
b) They increase the activation energy of reactions
c) They are specific to substrates
d) They perform their function in high concentrations

Answer
c) They are specific to substrates

Which type of lipid is most commonly used for energy storage?
a) Phospholipids
b) Triglycerides
c) Steroids
d) Waxes

Answer
b) Triglycerides

Which type of carbohydrate is found in DNA and RNA?
a) Glucose
b) Ribose
c) Fructose
d) Sucrose

Answer
b) Ribose

What is the primary structural component of the fungal cell wall?
a) Cellulose
b) Chitin
c) Starch
d) Glycogen

Answer
b) Chitin

Which biological molecule is involved in the transport of oxygen in the blood?
a) Hemoglobin
b) Insulin
c) Collagen
d) Myelin

Answer
a) Hemoglobin

Which of the following molecules is an energy carrier in cells?
a) DNA
b) RNA
c) ATP
d) Cellulose

Answer
c) ATP

What type of biological molecule is glycogen?
a) Carbohydrate
b) Protein
c) Lipid
d) Nucleic acid

Answer
a) Carbohydrate

If you are interested to enhance your knowledge regarding PhysicsChemistryComputer, and Biology please click on the link of each category, you will be redirected to dedicated website for each category.

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