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Cells the Living Uni

QuestionAnswer
You observe a small, nonpolar molecule near a membrane. How would this molecule likely transport across the membrane? simple diffusion
What are the two basic steps of polypeptide synthesis? translation and transcription
Which of the following organelles is correctly paired with its function? a. mitochondrion: packaging proteins and lipids b. Golgi apparatus: produce energy for the cell c. lysosome: protein synthesis d. smooth endoplasmic reticulum: metaboli smooth endoplasmic reticulum: metabolism of lipids
Which of the following is a component of the plasma membrane that creates a chemical barrier between the inside and the outside of the cell? phospolipids
Which of the following is NOT one of the three major components of a typical eukaryotic cell? plasma membrane ribosome cytoplasm nucleus ribosome
During DNA replication, the covalent bonding of nucleotides into a new strand of DNA is performed by ________. DNA polymerse
What can we infer if we see a large number of mitochondria in a cell? The cell has a great metabolic demand.
Which of the following correctly states the functions of the rough endoplasmic reticulum? synthesis of the cell's membranes The rough ER synthesizes all proteins secreted from the cell; it also functions as the cell's "membrane factory" because integral proteins and phospholipids that form part of all cellular membranes are manufactured there.
Rough endoplasmic reticulum "membrane factory"
Which organelle is responsible for synthesizing proteins? ribosomes
Prophase has a series of checkpoints that determine whether a cell will undergo all stages of mitosis. True or False False
What is the difference between active and passive transport across the plasma membrane? Active transport is ATP dependent, whereas passive transport uses only the kinetic energy of the particles for movement across the plasma membrane
What must happen before a body cell can begin mitotic cell division? its DNA must be replicated exactly so that identical copies of the cell's genes can be passed on to each of its offspring.
Which of the following is a component of the plasma membrane that creates a chemical barrier between the inside and the outside of the cell? phospolipids
Which of the following is the main component of the cell membrane? phospolipids
Which of the following is a characteristic of the cell membrane? semipermeable
Which of the following is not a major function of proteins in the cell membrane? forming the entire glycocalyx
What part of a cell membrane is usually in contact with the interstitial fluid? phosphate heads of phospholipids
Which of the following would NOT diffuse through the plasma membrane by means of simple diffusion? glucose
Which of the following is not required for osmosis to occur? -cellular energy -concentration gradient -water selectively permeable membrane cellular energy
Which of the following solutions contains the most solute? hypertonic
In general, to maintain homeostasis the relationship between our intracellular and extracellular fluids should be which of the following? isotonic to each other
If a person is severely dehydrated, their extracellular fluids will become hypertonic to the intracellular fluid. What do you predict will happen to the person’s cells? the cell will lose water and shrink
Which of the following names the three main parts of a human cell? cytoplasm, plasma membrane, and nucleus
Which of the following best explains diffusion? a.exchange of nonpolar molecules for polar molecules b. movement of molecules farther away from equilibrium c. movement of molecules from where there are fewer of them to where there are more movement of molecules from an area of high concentration to an area of low concentration
Which of the following is most likely to move through the cell membrane by facilitated diffusion? Na+
What is the basic difference between simple diffusion and facilitated diffusion across a cell membrane? In facilitated diffusion, molecules only move with the aid of a protein in the membrane.
Which of the following is least likely to increase the rate of diffusion? small concentration gradient
Plasma membrane the outer boundary of the cell
Nucleus
Created by: DebbieB
 

 



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