Biomolecules
Q. What are the building blocks of nucleic acids?
-
A.
Amino acids
-
B.
Fatty acids
-
C.
Nucleotides
-
D.
Monosaccharides
Solution
Nucleotides are the building blocks of nucleic acids like DNA and RNA.
Correct Answer: C — Nucleotides
Learn More →
Q. What is denaturation of proteins?
-
A.
The process of protein synthesis
-
B.
The loss of protein function due to structural changes
-
C.
The formation of peptide bonds
-
D.
The folding of proteins into their functional shape
Solution
Denaturation refers to the process where proteins lose their native structure and function due to external factors like heat or pH changes.
Correct Answer: B — The loss of protein function due to structural changes
Learn More →
Q. What is the basic building block of proteins?
-
A.
Nucleotides
-
B.
Fatty acids
-
C.
Amino acids
-
D.
Monosaccharides
Solution
Proteins are made up of amino acids, which are their basic building blocks.
Correct Answer: C — Amino acids
Learn More →
Q. What is the basic structural unit of proteins?
-
A.
Nucleotide
-
B.
Monosaccharide
-
C.
Amino acid
-
D.
Fatty acid
Solution
Proteins are made up of long chains of amino acids.
Correct Answer: C — Amino acid
Learn More →
Q. What is the basic unit of nucleic acids?
-
A.
Amino acid
-
B.
Nucleotide
-
C.
Monosaccharide
-
D.
Fatty acid
Solution
The basic unit of nucleic acids, such as DNA and RNA, is the nucleotide.
Correct Answer: B — Nucleotide
Learn More →
Q. What is the basic unit of proteins?
-
A.
Nucleotide
-
B.
Monosaccharide
-
C.
Amino acid
-
D.
Fatty acid
Solution
Proteins are made up of amino acids, which are their basic building blocks.
Correct Answer: C — Amino acid
Learn More →
Q. What is the function of hemoglobin in the body?
-
A.
To catalyze reactions
-
B.
To transport oxygen
-
C.
To provide structural support
-
D.
To store energy
Solution
Hemoglobin is a protein that functions to transport oxygen from the lungs to tissues throughout the body.
Correct Answer: B — To transport oxygen
Learn More →
Q. What is the general formula for carbohydrates?
-
A.
C_n(H2O)_n
-
B.
C_nH_nO_n
-
C.
C_nH_2nO_n
-
D.
C_nH_2O_n
Solution
The general formula for carbohydrates is C_n(H2O)_n, indicating that they are hydrates of carbon.
Correct Answer: A — C_n(H2O)_n
Learn More →
Q. What is the isoelectric point (pI) of a protein?
-
A.
The pH at which the protein is positively charged
-
B.
The pH at which the protein is negatively charged
-
C.
The pH at which the protein has no net charge
-
D.
The pH at which the protein is denatured
Solution
The isoelectric point (pI) of a protein is the pH at which the protein has no net charge, leading to minimal solubility.
Correct Answer: C — The pH at which the protein has no net charge
Learn More →
Q. What is the isoelectric point of a protein?
-
A.
The pH at which the protein is positively charged
-
B.
The pH at which the protein is negatively charged
-
C.
The pH at which the protein has no net charge
-
D.
The pH at which the protein denatures
Solution
The isoelectric point of a protein is the pH at which the protein has no net charge, leading to minimal solubility.
Correct Answer: C — The pH at which the protein has no net charge
Learn More →
Q. What is the main component of cell membranes?
-
A.
Proteins
-
B.
Carbohydrates
-
C.
Phospholipids
-
D.
Nucleic acids
Solution
Phospholipids are the main component of cell membranes, forming a bilayer.
Correct Answer: C — Phospholipids
Learn More →
Q. What is the main component of the cell membrane?
-
A.
Proteins
-
B.
Carbohydrates
-
C.
Phospholipids
-
D.
Nucleic acids
Solution
Phospholipids are the main component of cell membranes, forming a bilayer.
Correct Answer: C — Phospholipids
Learn More →
Q. What is the main function of carbohydrates in living organisms?
-
A.
Genetic information
-
B.
Energy storage
-
C.
Catalysis
-
D.
Structural support
Solution
The main function of carbohydrates is energy storage and providing energy to living organisms.
Correct Answer: B — Energy storage
Learn More →
Q. What is the main function of lipids in biological systems?
-
A.
Energy storage
-
B.
Genetic information
-
C.
Catalysis
-
D.
Structural support
Solution
Lipids primarily function in energy storage, as well as forming cell membranes.
Correct Answer: A — Energy storage
Learn More →
Q. What is the main storage form of carbohydrates in animals?
-
A.
Starch
-
B.
Glycogen
-
C.
Cellulose
-
D.
Chitin
Solution
Glycogen is the main storage form of carbohydrates in animals, while starch is the storage form in plants.
Correct Answer: B — Glycogen
Learn More →
Q. What is the main structural component of plant cell walls?
-
A.
Starch
-
B.
Glycogen
-
C.
Cellulose
-
D.
Chitin
Solution
Cellulose is the main structural component of plant cell walls.
Correct Answer: C — Cellulose
Learn More →
Q. What is the molecular formula of fructose?
-
A.
C6H12O6
-
B.
C5H10O5
-
C.
C6H10O5
-
D.
C5H12O6
Solution
Fructose has the same molecular formula as glucose, which is C6H12O6.
Correct Answer: A — C6H12O6
Learn More →
Q. What is the primary function of carbohydrates in living organisms?
-
A.
Energy storage
-
B.
Genetic information
-
C.
Catalysis
-
D.
Structural support
Solution
Carbohydrates primarily serve as a source of energy in living organisms.
Correct Answer: A — Energy storage
Learn More →
Q. What is the primary function of enzymes in biological systems?
-
A.
Store energy
-
B.
Speed up chemical reactions
-
C.
Provide structural support
-
D.
Transport molecules
Solution
Enzymes act as catalysts to speed up chemical reactions in biological systems.
Correct Answer: B — Speed up chemical reactions
Learn More →
Q. What is the primary function of enzymes?
-
A.
Store energy
-
B.
Speed up chemical reactions
-
C.
Provide structure
-
D.
Transport substances
Solution
Enzymes are biological catalysts that speed up chemical reactions in the body.
Correct Answer: B — Speed up chemical reactions
Learn More →
Q. What is the primary function of lipids in biological systems?
-
A.
Energy storage
-
B.
Catalysis
-
C.
Genetic information
-
D.
Structural support
Solution
Lipids serve as a major form of energy storage in organisms.
Correct Answer: A — Energy storage
Learn More →
Q. What is the primary storage form of carbohydrates in animals?
-
A.
Starch
-
B.
Glycogen
-
C.
Cellulose
-
D.
Chitin
Solution
Glycogen is the primary storage form of carbohydrates in animals.
Correct Answer: B — Glycogen
Learn More →
Q. What is the primary structural component of plant cell walls?
-
A.
Starch
-
B.
Glycogen
-
C.
Cellulose
-
D.
Chitin
Solution
Cellulose is the primary structural component of plant cell walls, providing rigidity and strength.
Correct Answer: C — Cellulose
Learn More →
Q. What is the primary structure of a protein determined by?
-
A.
Hydrogen bonds
-
B.
Ionic bonds
-
C.
Peptide bonds
-
D.
Disulfide bridges
Solution
The primary structure of a protein is determined by the sequence of amino acids linked by peptide bonds.
Correct Answer: C — Peptide bonds
Learn More →
Q. What is the primary structure of a protein?
-
A.
The sequence of amino acids
-
B.
The folding of the polypeptide chain
-
C.
The arrangement of multiple polypeptide chains
-
D.
The interaction between side chains
Solution
The primary structure of a protein refers to the linear sequence of amino acids in the polypeptide chain.
Correct Answer: A — The sequence of amino acids
Learn More →
Q. What is the role of ATP in cells?
-
A.
Storage of genetic information
-
B.
Energy currency
-
C.
Structural component
-
D.
Signal transduction
Solution
ATP (adenosine triphosphate) serves as the primary energy currency in cells.
Correct Answer: B — Energy currency
Learn More →
Q. What is the role of enzymes in biochemical reactions?
-
A.
Increase activation energy
-
B.
Decrease activation energy
-
C.
Change the equilibrium of the reaction
-
D.
Provide energy for the reaction
Solution
Enzymes act as catalysts that decrease the activation energy required for biochemical reactions.
Correct Answer: B — Decrease activation energy
Learn More →
Q. What is the role of enzymes in biological systems?
-
A.
To provide structural support
-
B.
To act as catalysts for biochemical reactions
-
C.
To store genetic information
-
D.
To transport molecules across membranes
Solution
Enzymes are proteins that act as catalysts, speeding up biochemical reactions without being consumed in the process.
Correct Answer: B — To act as catalysts for biochemical reactions
Learn More →
Q. What is the role of RNA in protein synthesis?
-
A.
Storage of genetic information
-
B.
Transcription of DNA
-
C.
Translation of proteins
-
D.
Both transcription and translation
Solution
RNA plays a crucial role in both the transcription of DNA and the translation of proteins.
Correct Answer: D — Both transcription and translation
Learn More →
Q. What is the simplest form of carbohydrate?
-
A.
Disaccharide
-
B.
Monosaccharide
-
C.
Polysaccharide
-
D.
Oligosaccharide
Solution
The simplest form of carbohydrate is a monosaccharide, which cannot be hydrolyzed into simpler sugars.
Correct Answer: B — Monosaccharide
Learn More →
Showing 1 to 30 of 140 (5 Pages)