Question 1

A membrane that is selectively permeable causes damage to the cell by allowing solutes to enter and leave the cell indiscriminately.

Accepted Answer

A selectively permeable membrane is actually beneficial to the cell as it allows necessary molecules to enter and exit the cell while keeping harmful molecules out. If the membrane was not selectively permeable and allowed all solutes to enter and leave the cell, it would cause damage to the cell.

Question 2

Nuclear pores allow the nucleus to pass through the plasma membrane.

Accepted Answer

Nuclear pores allow molecules to pass between the nucleus and cytoplasm, but they do not allow the entire nucleus to pass through the plasma membrane.

Question 3

The microfilaments that allow cells to move contain the protein __________.

Accepted Answer

The answer of The microfilaments that allow cells to move...

Question 4

Microtubules are composed of tubulin monomers.

Accepted Answer

Microtubules are composed of tubulin monomers, which are proteins that polymerize to form the long, cylindrical structure of the microtubule.

Question 5

Cilia are usually thicker and longer than flagella.

Accepted Answer

Cilia are usually shorter and thinner than flagella.

Question 6

The hydrophobic portions of a membrane's phospholipid bilayer are oriented toward the interior of the membrane.

Accepted Answer

This is because the hydrophobic portions of the phospholipid molecules are nonpolar and are therefore repelled by water. The interior of the membrane, where there is no water, is the only place where these hydrophobic portions can be shielded from water, so they naturally orient themselves inwards. The hydrophilic portions of the phospholipids, on the other hand, are polar and interact with water, so they form the outer and inner surfaces of the membrane where they can be in contact with water.

Question 7

Eukaryotic cells contain membrane-bound organelles.

Accepted Answer

Eukaryotic cells contain membrane-bound organelles such as the nucleus, mitochondria, endoplasmic reticulum, Golgi apparatus, lysosomes, and peroxisomes.

Question 8

Certain cells found in humans are identical to certain cells found in plants.

Accepted Answer

While there are some similarities between plant and animal cells, they are not identical. Each type of organism has unique cellular structures and processes that are tailored to its specific needs and environment.

Question 9

A microscope is used to obtain a magnified view of an object.

Accepted Answer

A microscope is an instrument used to magnify and view small objects that cannot be seen with the naked eye.

Question 10

The movements of wound-healing fibroblasts in your body depend on pseudopodia that can extend and retract, because the microfilaments in them can rapidly change their length.

Accepted Answer

Fibroblasts do use pseudopodia for movement, and the microfilaments in them are capable of rapid changes in length that allow for extension and retraction.

Question 11

The internal pH of a lysosome is about 5-quite a bit lower than the cytoplasm of the cell in which the lysosome resides. What is one advantage to not having the lysosome's enzymes function best at the cytoplasm's pH of 7?

Accepted Answer

The answer of The internal pH of a lysosome is...

Question 12

A ribosome has internal cristae.

Accepted Answer

Ribosomes do not have internal cristae. Cristae are structures found within mitochondria, which are responsible for cellular respiration. Ribosomes, on the other hand, are responsible for protein synthesis and do not have internal membrane structures.

Question 13

Mitochondria produce most of the energy used in a bacterial cell.

Accepted Answer

Mitochondria are organelles found in eukaryotic cells and are responsible for producing the majority of the energy used in those cells through cellular respiration. Bacterial cells do not have mitochondria and instead generate energy through various metabolic pathways.

Question 14

Prokaryotic cells are generally larger than eukaryotic cells.

Accepted Answer

Eukaryotic cells are generally larger than prokaryotic cells, with some eukaryotic cells reaching lengths of over a meter. Prokaryotic cells are typically between 1-10 micrometers in length.

Question 15

_____ _____ are the part of the cytoskeleton that provide mechanical strength to cells and reinforce the membranes of organelles.

Accepted Answer

The answer of _____ _____ are the part of the...

Question 16

In eukaryotic cells both the nucleus and mitochondria have double membranes.

Accepted Answer

Both the nucleus and mitochondria in eukaryotic cells have double membranes. The nucleus has an outer membrane and an inner membrane, while the mitochondria have an outer membrane and an inner membrane that contains folds called cristae.

Quiz 5: Cell Structure and Internal Compartments