Bio 172 quiz 2

Long, saturated fatty acid tails __________ lipid mobility and ___________ membrane fluidity. A. Reduce; decrease B. Enhance; maintain C. Maintain; decrease D. Reduce; increase E. Enhance; increase

A. Reduce; decrease

Which one of the following types of fatty acids would be likely to have the lowest melting temperature? A. Short tails and low saturation B. Long tails and low saturation C. Short tails and high saturation D. Long tails and high saturation E. All fatty acids have the same melting temperature regardless of tail length or level of saturation.

A. Short tails and low saturation

Which one of the following would be found in the cells of a blade of grass but not in the cells of an insect feeding on that grass? Select all correct choices. A. Cytoskeletal elements B. Chloroplasts C. Mitochondria D. Endoplasmic reticulum E. Nuclei

B. Chloroplasts

Exposure of purified phospholipids to water results in the spontaneous formation of: A. Steroids B. Lipid bilayers C. Polypeptides D. Carbohydrates E. Triacylglycerols

B. Lipid bilayers

Some diseases, such as Tay-Sachs, are caused by the defective breakdown of cellular components. Which of the following organelles is defective? A. Golgi apparatus B. Lysosome C. Plasma membrane D. Ribosome E. Endoplasmic reticulum

B. Lysosome

Which of the following is not a typical component of an animal cell's plasma membrane? Select all correct choices. A. Carbohydrate B. Protein C. Nucleic acid D. Lipid

B. Nucleic Acid

Which of the following types of organisms would be most likely to organize its genome into a nucleoid region? A. Plants B. Fungi C. Protists D. Archaea

D. Archaea

Triacylglycerols are used primarily for: A. Information storage B. Biological catalysis C. Cell membrane biosynthesis D. Energy storage E. Movement

D. Energy storage

The cytoskeleton of animal cells includes: A. Microtubules and microfilaments B. Tubulin, microfilaments, and intermediate filaments C. Actin, microfilaments, and intermediate filaments D. Microtubules, microfilaments, and intermediate filaments E. Actin, microtubules, and intermediate filaments

D. Microtubules, microfilaments, and intermediate filaments

The lipid components of cellular membranes include ______________________. A. Fatty acids and cholesterol B. Phospholipids C. Phospholipids and fatty acids D. Phospholipids and cholesterol

D. Phospholipids and Cholesterol