Honors- Chapter 3 assessment AM 2025

Name

The three major parts of a cell are

• the endoplasmic reticulum, Golgi apparatus and vesicles
• the nucleus, nucleolus, and nuclear envelope.
• microtubules, ribosomes, and centrosomes.
• the nucleus, cytoplasm, and cell membrane.

The major components of the cell membrane are

• lipids and carbohydrates
• proteins and carbohydrates
• lipids and proteins
• carbohydrates and monosaccharides

Which of the following correctly describes the structural organization of the cell membrane? 


• A solid, rigid layer of phospholipid with loosely bound protein molecules
• A bilayer of phospholipid molecules in which protein molecules are embedded and can move
• Rigid layers of protein molecules in which carbohydrate molecules are suspended
• Three layers; lipid on the inside, protein in the middle, and carbohydrates (and polysaccharides) on the outside

Endoplasmic reticulum is best described as a

• component of the cytoskeleton
• cellular inclusion
• nuclear pore
• network of interconnected membranes

A young man who ran 6 miles a day throughout high school is injured during his first season running cross country in college, and must rest for three months, then gradually begin exercising again. The skeletal muscle size in his lower limbs decreases during this prolonged period of inactivity. The organelles that break down his muscle protein are 


• perioxisomes
• lysosomes
• centrosomes
• ribosomes

For which of the following organelles is the structure and function correctly described?

• Endoplasmic reticulum-a network of interconnected membranes forming sacs and canals that packages protein molecules for secretion
• Ribosomes-membranous vesicles containing digestive enzymes
• Golgi apparatus-particles, composed of protein and RNA, which synthesize proteins
• Mitochondrion-nonmembranous structure that synthesizes proteins

In a cell, lipids are synthesized in the

• Golgi apparatus
• smooth endoplasmic reticulum
• rough endoplasmic reticulum
• mitochondria

What characteristic do simple diffusion and facilitated diffusion share?

• Both require cellular energy for the transport of substances.
• Both move water across a semipermeable membrane.
• Both require a special carrier molecule to move substances across the membrane.
• Both move a substance from a region of higher concentration to one of lower concentration without cellular energy.

If the concentration of glucose in the water outside of a cell is higher than the concentration inside, 


• water will enter the cell by osmosis.
• water will leave the cell by osmosis.
• glucose will enter the cell by osmosis.
• glucose will leave the cell by osmosis.