Question

the following table shows the composition, uses, and examples of four molecules.

	molecule 1	molecule 2	molecule 3	molecule 4
example	a	glucose	steroid	d
uses	heredity information	b	energy storage	reaction regulation, transport, movement

which of the following correctly completes the table?
a = dna or rna, b = cell fuel and support, c = galactose and glycogen, d = nucleic acids and fatty acids
a = dna or rna, b = cell fuel and support, c = fatty acids and glycerol, d = hemoglobin and amylase
a = fructose and lipids, b = cell fuel and support, c = deoxyribose and ribose, d = nucleotides and myosin
a = hemoglobin and amylase, b = cell fuel and reproduction, c = deoxyribose and ribose, d = sugars and lipids

Explanation:

Step1: Identify Molecule 1

Molecule 1 has monomers of sugar, phosphate and nitrogen - base. Nucleic acids (DNA and RNA) have such monomers and are used for heredity information. So A should be DNA or RNA.

Step2: Identify Molecule 2

Molecule 2 has monomers of monosaccharides. Monosaccharides are the building - blocks of carbohydrates. Glucose is a monosaccharide and carbohydrates are used as cell fuel and for support. So B is cell fuel and support.

Step3: Identify Molecule 3

Molecule 3 is a steroid and is used for energy storage. Lipids (fatty acids and glycerol) are related to energy storage and steroids are a type of lipid. So C is fatty acids and glycerol.

Step4: Identify Molecule 4

Molecule 4 has monomers with amino and carboxyl groups, which are amino - acids. Proteins are made of amino - acids and are used for regulation, transport and movement. Hemoglobin and amylase are proteins. So D is hemoglobin and amylase.

Answer:

A = DNA or RNA, B = cell fuel and support, C = fatty acids and glycerol, D = hemoglobin and amylase