A. Lipids are generally water soluble.
B. Proteins are polypeptides.
C. Polysaccharides are long chains of sugars.
D. Adenine and guanine are substituted pyrimidines.
E. Almost all enzymes are proteins.
Choose the correct answer from the options given below :
Biomolecule Statements Analysis
Statement A: Lipids Solubility
Lipids are primarily nonpolar molecules, meaning they do not mix well with water, which is a polar solvent. Therefore, lipids are generally insoluble in water (hydrophobic).
Statement A is incorrect.
Statement B: Proteins as Polypeptides
Proteins are large biomolecules. They are polymers made up of amino acid monomers. These amino acids are linked together by peptide bonds to form a long chain, which is known as a polypeptide. A protein consists of one or more polypeptides.
Statement B is correct.
Statement C: Polysaccharides Structure
Polysaccharides are a type of carbohydrate. They are formed when many simple sugar units (monosaccharides) are joined together by glycosidic bonds. This results in long chains of sugars.
Statement C is correct.
Statement D: Adenine and Guanine Classification
Adenine and guanine are two of the five main nitrogenous bases found in nucleic acids. They are classified as purines, which have a characteristic double-ring structure. The other bases, cytosine, thymine, and uracil, are classified as pyrimidines, which have a single-ring structure.
Statement D is incorrect.
Statement E: Enzymes Composition
Enzymes are biological catalysts responsible for speeding up chemical reactions in living organisms. The vast majority of known enzymes are proteins. While a small number of RNA molecules (ribozymes) also exhibit catalytic activity, proteins are the principal type of enzyme.
Statement E is correct.
Conclusion on Correct Statements
The analysis shows that statements B, C, and E are correct descriptions related to biomolecules.
Summary of Correct Statements
- B. Proteins are polypeptides.
- C. Polysaccharides are long chains of sugars.
- E. Almost all enzymes are proteins.
Similar Questions
- Match List I with List II :
List I List II A. Trypsin I. Intercellular ground substance B. Morphine II. Lectin C. Concanavalin A III. Enzyme D. Collagen IV. Alkaloid
Choose the correct answer from the options given below : - Which of the following statements are correct regarding amino acids ?
A. They are substituted methanes.
B. Serine is an aromatic amino acid.
C. Valine is a neutral amino acid.
D. Lysine is an acidic amino acid.
Choose the correct answer from the options given below : - Alpha-helix is found in which level of protein structure ?
Non-membrane bound cell organelles found in both prokaryotic and eukaryotic cells are : ____________________
- Match List I with List II :
List I (Phase of cell cycle) List II (Activity) A. $G_1$ phase I. Actual cell division occurs B. S phase II. Cell is metabolically active and continuously grows but does not replicate its DNA C. $G_2$ phase III. Synthesis of DNA occurs and the amount of DNA per cell doubles D. M phase IV. Proteins are synthesized while cell growth continues
Choose the correct answer from the options given below : - Select the correct statements regarding cell membrane in eukaryotic cell.
A. Membrane of human RBCs has approximately 52% protein.
B. The phospholipids are arranged in a bilayer.
C. Extensions of the plasma membrane into the cell form mesosomes.
D. Tails towards the inner part of lipids are hydrophobic and thus protected from aqueous medium.
E. Glycocalyx is present on the outer surface of the plasma membrane.
Choose the correct answer from the options given below : - Choose the correct statements regarding cell organelles and their inclusions.
A. The endomembrane system includes Golgi complex, endoplasmic reticulum and mitochondria.
B. Rough endoplasmic reticulum bears ribosomes on its surface.
C. Both mitochondria and plastids have circular DNA.
D. A network of microtubules, microfilaments and intermediate filaments present in the cytoplasm is called cytoskeleton.
E. Mitochondrion is a single membrane-bound structure.
Choose the correct answer from the options given below : - The following reaction depicts the activity of a particular class of enzymes :
$$ \begin{array}{cc} \text{X} & \text{Y} \\ | & | \\ \text{C} - & \text{C} \end{array} \xrightarrow{E} \text{X} - \text{Y} + \text{C} = \text{C} $$
(Substrate) $\quad$ (Product) (Product)
Identify the enzyme class 'E' from the following options :
Important Questions from Structure and Function of Cell
- Match List I with List II :
List I List II A. Trypsin I. Intercellular ground substance B. Morphine II. Lectin C. Concanavalin A III. Enzyme D. Collagen IV. Alkaloid
Choose the correct answer from the options given below : - Which of the following statements are correct regarding amino acids ?
A. They are substituted methanes.
B. Serine is an aromatic amino acid.
C. Valine is a neutral amino acid.
D. Lysine is an acidic amino acid.
Choose the correct answer from the options given below : - Alpha-helix is found in which level of protein structure ?
Non-membrane bound cell organelles found in both prokaryotic and eukaryotic cells are : ____________________
- Match List I with List II :
List I (Phase of cell cycle) List II (Activity) A. $G_1$ phase I. Actual cell division occurs B. S phase II. Cell is metabolically active and continuously grows but does not replicate its DNA C. $G_2$ phase III. Synthesis of DNA occurs and the amount of DNA per cell doubles D. M phase IV. Proteins are synthesized while cell growth continues
Choose the correct answer from the options given below :
