Physiology Chapter 2 Quiz 3

The most important energy-transferring compound in cells is a nucleotide known as 1. protein 2. deoxyribonucleic acid 3. adenosine triphosphate 4. glucose 5. fructose

3. adenosine triphosphate.

All of these statements about carbohydrates are true except one. Identify the exception. 1. Glycogen is a storage polysaccharide made by animal cells. 2. Simple sugars include galactose, glucose, and ribose. 3. Polysaccharides are important both for energy storage and to provide structure to cells. 4. Glycogen is important both for energy storage and to provide structure for cells. 5. Cellulose is the most abundant carbohydrate on earth.

4. Glycogen is important both for energy storage and to provide structure for cells.

Which is the most abundant biomolecule in the human body? 1. Carbohydrates 2. Lipids 3. Nucleotides 4. Protein

1. Carbohydrates

The molecule RNA contains the five-carbon sugar 1. ribose 2. lactose 3. glucose 4. uracil 5. deoxyribose

1. Ribose

Which of the following biological molecules does glycogen belong to? 1. carbohydrates 2. proteins 3. lipids 4. nucleotides 5. lipids and proteins

1. carbohydrates

Each amino acid differs from others in the 1. chemical structure of the R group. 2. size of the amino group. 3. number of carboxyl groups. 4. number of peptide bonds in the molecule. 5. number of central carbon atoms

1. chemical structure of the R group.

The sequence and number of amino acids in the chain is an example of which of the following levels of protein structure? 1. primary 2. secondary 3. tertiary 4. quaternary 5. alpha helix

1. primary

Which of the following is an important characteristic of lipids? 1. They can be linked into long chains 2. They are nonpolar 3. They dissolve in water 4. They are converted to hormones

2. They are nonpolar.

Cholesterol is 1. a structural component of cell membranes. 2. a precursor to steroid hormones, a structural component of cell membranes, and a dangerous fat that is absent from a healthy body. 3. a precursor to steroid hormones. 4. a precursor to steroid hormones and a structural component of cell membranes. 5. a dangerous fat that is absent from a healthy body

4. a precursor to steroid hormones and a structural component of cell membranes.

To which of the following groups of biomolecules do triglycerides and steroids belong? 1. carbohydrates 2. lipids and proteins 3. nucleotides 4. lipids 5. proteins

4. lipids

Potassium channels are usually composed of several subunits. This is an example of which level of protein structure? 1. primary 2. secondary 3. tertiary 4. quaternary 5. alpha helix

4. quaternary

Which of the following biological molecules exhibit the characteristics of saturation, specificity and competition> 1. lipids and proteins 2. lipids 3. nucleotides 4. receptor proteins 5. carbohydrates

4. receptor proteins

The largest carbohydrate molecules are called polysaccharides because they are composed of ________ molecules bonded together with one another. 1. pyrimidine 2. nucleotide 3. amino acid 4. purine 5. sugar

5. Sugar

A nucleotide consists of a 1. five-carbon sugar and an amino acid 2. five-carbon sugar and a nitrogenous base 3. five-carbon sugar and phosphate base 4. phosphate group and a nitrogenous base 5. five-carbon sugar, a nitrogenous base, and a phosphate group

5. five-carbon sugar, a nitrogenous base, and a phosphate group

Nucleic acids are polymers of units called 1. ribose. 2. fatty acids. 3. amino acids. 4. bases. 5. nucleotides

5. nucleotides

In regard to lipids, the term unsaturated refers to 1. the ring structure of steroids. 2. fats, such as butter and lard, which come from animal sources. 3. . glycerol, which acts as an anchor for joined fatty acids. 4. the lack of double bonds between adjacent carbon atoms in a fatty acid. 5. the presence of double bonds between adjacent carbon atoms in a fatty acid

5. the presence of double bonds between adjacent carbon atoms in a fatty acid. Submit