Questions and Answers
Which structure of protein remains intact after coagulation of egg white on boiling?
Two nucleotides are joined together by a linkage known as:
Match List I with List II:
Ziegler catalyst = Titanium Blood pigment = Iron Wilkinson catalyst = Rhodium Vitamin B12 = Cobalt
Type of amino acids obtained by hydrolysis of proteins is:
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Number of compounds that contain sulphur among these: Furan, Thiophene, Pyridine, Pyrrole, Cysteine, Tyrosine
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Match List I with List II:
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Sugar which does not give reddish brown precipitate with Fehling's reagent is:
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The total number of correct statements regarding nucleic acids is:
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Match List I with List II:
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From the vitamins A, B1, B6, B12, C, D, E and K, the number of vitamins that can be stored in our body is:
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What is the molar mass of compound (x) that undergoes acetylation to give a product?
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Study Notes
Nucleotides and Linkages
- Two nucleotides are joined by a phosphodiester linkage.
- This linkage is a key feature of nucleic acids like DNA and RNA.
Protein Structures and Denaturation
- Boiling egg white denatures proteins, retaining only primary structure.
- Denaturation leads to the loss of secondary, tertiary, and quaternary structures.
Amino Acids and Proteins
- Proteins consist of α-amino acids connected by peptide linkages.
- Hydrolysis of proteins produces only α-amino acids.
Chemical Associations
- Ziegler catalyst is associated with Titanium.
- Blood pigment relates to Iron.
- Wilkinson catalyst is linked to Rhodium.
- Vitamin B12 contains Cobalt.
Heteroatoms in Compounds
- Among furan, thiophene, pyridine, pyrrole, cysteine, and tyrosine, two compounds contain sulfur as a heteroatom.
Sugar Tests
- Sucrose does not produce a reddish-brown precipitate with Fehling's reagent due to lack of a hemiacetal group.
- Other sugars like lactose, glucose, and maltose give a positive test.
Nucleic Acids Information
- Only three statements about nucleic acids are accurate:
- DNA self-duplicates during cell division.
- The message for protein synthesis is present in DNA.
- Identical DNA strands are transferred to daughter cells.
- RNA is not the reserve of genetic information, and DNA does not directly synthesize proteins.
Vitamins Storage
- Vitamins A, D, E, K, and B12 can be stored in the body, specifically in the liver and adipose tissue.
- This totals to five vitamins that can be stored.
Chemical Reactions with Glucose
- Glucose reacts with different reagents to yield various products:
- No reaction with NaHCO3.
- Acetylation can yield distinct derivatives.
- Reaction with HNO3 produces saccharic acid.
- HI treatment gives n-hexane.
- Bromine in water leads to gluconic acid.
These notes summarize key concepts from biomolecules, including the structure and functions of nucleotides, proteins, sugars, and vitamins, as well as important chemical reactions.
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Description
Test your knowledge on biomolecules with this quiz that explores key concepts, including the types of linkages that bond nucleotides. Each question is multiple-choice, challenging your understanding of fundamental biological structures. Ideal for students studying molecular biology or biochemistry.
