Biological Membranes quiz #2 Flashcards
Biological Membranes quiz #2
You can tap to flip the card.
Control buttons has been changed to "navigation" mode.
1/11Skip to main content
Which of the following is not part of the plasma membrane? A) Phospholipids B) Proteins C) RNA D) Cholesterol
C) RNA Which of the following is not a characteristic of the plasma membrane? A) Rigid and static B) Fluid and dynamic C) Composed of a phospholipid bilayer D) Contains embedded proteins
A) Rigid and static Which membrane is gelatinous? A) Plasma membrane B) Nuclear envelope C) Cytoplasmic membrane D) Glycocalyx
D) Glycocalyx What is the relationship between steroid hormones and cell membranes?
Steroid hormones can pass through cell membranes due to their lipid-soluble nature. Which of the following statements regarding membrane function is false? A) Membranes are selectively permeable. B) Membranes are rigid and immobile. C) Membranes contain proteins that assist in transport. D) Membranes are involved in cell signaling.
B) Membranes are rigid and immobile. Which components form the structure of the plasma membrane? A) Phospholipids, proteins, and cholesterol B) DNA, RNA, and proteins C) Carbohydrates, nucleic acids, and lipids D) Proteins, nucleic acids, and carbohydrates
A) Phospholipids, proteins, and cholesterol Which is present in the nuclear membrane (envelope) that is not present in the cell membrane? A) Nuclear pores B) Cholesterol C) Glycoproteins D) Phospholipids
A) Nuclear pores Which of the following molecules are the major component of the plasma membrane? A) Proteins B) Carbohydrates C) Phospholipids D) Nucleic acids
C) Phospholipids What would happen to the plasma membrane without cholesterol?
Without cholesterol, the plasma membrane would become less fluid and more susceptible to temperature changes. What is the function of cholesterol in the membrane?
Cholesterol helps to stabilize the membrane and maintain its fluidity. What is the fluid mosaic model, and how does it describe the structure and behavior of biological membranes?
The fluid mosaic model describes biological membranes as dynamic structures composed of a phospholipid bilayer with embedded proteins, cholesterol, and carbohydrates. The 'fluid' aspect refers to the ability of these molecules to move laterally within the membrane, while the 'mosaic' aspect highlights the diverse components that make up the membrane. This model emphasizes that the membrane is not rigid but flexible and constantly changing.
06:49
