b rt
The bacterial cell, because it has the largest surface-to-volume ratio.
A spherical bacterial cell has a radius of 3μm. The human egg cell has a radius of 100μm. Which statement correctly indicates the cell that is able to more efficiently exchange materials with the external environment and provides a correct explanation?
The egg was placed in a hypotonic solution in turn water flowed into the egg from the solution.
An egg is placed into a solution and the mass of the egg increases after 24 hours. What conclusion can be drawn about this situation?
Rough ER can synthesize and package proteins for export, and smooth ER cannot.
Cells contain smaller components called organelles that are necessary for a cell's survival. Organelle functions have often been compared to components of larger systems. Which of the following functional differences between the rough and smooth endoplasmic reticulum (ER) is explained by the structural differences between them?
plasma membrane receptors bind molecules to be expelled
During receptor-mediated endocytosis, ____.
biofilms
Groups of bacteria living together in a close knit group are also known as ____.
There was a net movement of water out of the cell suspended in the sugar solution and a net movement of water into the cell suspended in the distilled water.
In an experiment, cells were isolated from an aquatic plant and suspended in pond water, a sucrose sugar solution, or distilled water. All of the cells were then viewed under a microscope. Compared with the cell in the pond water, the cell in the sugar solution appeared shriveled, and the cell in the distilled water appeared inflated. The results of the experiment are represented in Figure 1. Which of the following statements best explains the observations represented in Figure 1 ?
Nucleus Cytoskeleton Vesicles Mitochondria Plasma Membrane
In the image, the letter P represents
Nucleolus
In the image, what structure is B?
Golgi Body
In the image, what structure is H?
Mitochondria
In the image, what structure is L?
vesicles
Lysosomes are specialized ____.
the cell is the smallest unit that displays the properties of life
One generalization of the cell theory is that ____.
chromatin
The accompanying figure is a photomicrograph of a nucleus. Letter B represents ____.
The hydrophilic phosphate groups of the phospholipid molecules are attracted to the aqueous internal and external environments.
The model below shows the structure of a portion of a plasma membrane in an animal cell. Which statement best explains the orientation of the phospholipid molecules in this model?
the diverse molecules making up membranes
The mosaic of the fluid mosaic model refers to ____.
Osmosis
The movement of water molecules across a semipermeable membrane is best described as
II only
The rate of diffusion through a selectively permeable membrane will be lowest when ____. I. concentration gradients are steep (large difference in concentration) II. temperatures are low III. solutes are small molecules
H+
The space between the two membranes of the mitochondria accumulates ____.
phospholipids
What components of membranes are the most abundant?
ribosome on RER→ vesicle → Golgi bodies → vesicle → plasma membrane
What is the correct sequence of polypeptide transport in the secretory pathway?
internal membranes surrounding organelles
What is the defining feature of a eukaryotic cell?
locomotion
What is the function of the structure labeled G in the accompanying figure?
active transport
What method of movement requires the expenditure of ATP molecules?
Golgi bodies
What primary structures package cellular secretions for export from the cell?
Ribosome
What protein producing structure is found on F?
solar energy
What type of energy is the energy in chemical bonds?
cube; square
When a cell expands in diameter, volume increases by the ____ of the diameter, and surface area increases by the____ of the diameter.
phagocytosis
When one cell engulf another cell such as a bacteria, this is called
Fewer lysosomes will be available to break down macromolecules to provide the necessary nutrients for cellular respiration.
Which of the following claims is scientifically accurate and consistent with an observation that a decrease in lysosome production within a cell leads to a decline in mitochondrial activity?
mitochondria
Which of the following contain enzymes used in the breakdown of glucose and generation of ATP?
simple diffusion
Which of the following is a form of active transport?
nucleolus
Which of the following is known for ribosome production?
mitochondria
Which of the following is thought to be the descendant of ancient bacteria?
Isotonic
Which term below best describes the following description: movement of molecules across a membrane would be equal
Turgor
Which term below best fits the following description: pressure from a fluid against a boundary
