34 Questions
What is the primary function of lipids in the body?
Long term energy storage
What is the sugar molecule found in RNA?
Ribose
What is the type of bond that links nucleotides together in a nucleic acid?
Phosphodiester bond
Which of the following nitrogenous bases is found in both DNA and RNA?
Guanine
What is the function of phospholipids in the body?
Major component of membranes
What is the central molecule in a nucleotide?
Pentose sugar
Which of the following amino acids is classified as essential?
Phenylalanine
What is the term for the sugar molecule that makes up the backbone of DNA?
Pentose sugar
What is the distance between each turn of the double helix model of DNA?
3.4 nm
What is the term for the bonding between two strands of DNA?
Complementary base pairing
Which of the following is NOT a component of a nucleotide?
Amino acid
What is the characteristic of Z-DNA?
Left-handed coiling with 12 base pairs
What is the ratio of purines to pyrimidines in a DNA molecule according to Chargaff's rule?
Purines = Pyrimidines
What is the percentage of total cellular RNA that is composed of messenger RNA (m-RNA)?
5%
What is the general structure of an amino acid?
Four substituent groups occupying the four valency positions
What is the carboxyl group in an amino acid?
COOH
Which of the following RNA types does not follow Chargaff's rule?
RNA in general
What is the general formula of carbohydrates?
Cn(H2O)n
What is the minimum number of carbon atoms required in a carbohydrate molecule?
3
What is the type of monosaccharide that has 6 carbon atoms?
Hexose
Which of the following is an example of a polysaccharide?
Glycogen
What is the functional group present in aldehyde carbohydrates?
CHO
Which of the following is a type of monosaccharide that is classified as a ketose?
Fructose
What is the characteristic of starch?
Highly branched
What is the function of glycogen?
Food reserve in animals
What is the monomeric unit of inulin?
Fructose
What is the characteristic of cellulose?
Made up of same monomeric units
What is the characteristic of chitin?
A structural polysaccharide
What is the primary function of ATP in the cell?
To provide energy for the cell
What is the main difference between primary and secondary metabolites?
Primary metabolites are involved in growth and development, while secondary metabolites are involved in defense and adaptation
Which of the following amino acids is classified as semi-essential?
Arginine
What is the main difference between simple and compound lipids?
Simple lipids are composed of a glycerol molecule and one or more fatty acid chains, while compound lipids are composed of a glycerol molecule and other molecules such as phosphates or carbohydrates
Which of the following is an example of a complex carbohydrate?
Cellulose
What is the primary function of ligases in the cell?
To build molecules
Test your knowledge of lipids and nucleic acids in biology, covering their functions, types, and structures. Learn about the different roles of lipids, including energy storage and protection, and understand the basics of nucleic acids, including DNA and RNA.
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