Question 1

Your muscle cells need large amounts of ATP to function in the movement of your body.Which of the following organelles would you expect to be especially abundant in muscle cells?

Accepted Answer

Mitochondria are the organelles responsible for producing ATP through cellular respiration. As muscle cells require a significant amount of ATP for movement, they would need to have a high abundance of mitochondria in order to support their energy needs.

Question 2

An animal cell that contains an extensive network of ________ is likely to be an important source of lipids and/or hormones important in the development and functioning of that animal.

Accepted Answer

The answer of An animal cell that contains an extensive...

Question 3

________ transport of molecules across a selectively permeable membrane requires the input of energy from the cell whereas ________ transport of molecules across a selectively permeable membrane does not require the use of cellular energy.

Accepted Answer

The answer of ________ transport of molecules across a selectively...

Question 4

The flexible poles providing structure to a soft-sided tent most closely resemble the

Accepted Answer

The flexible poles that provide structure to a soft-sided tent serve the same function as the cytoskeleton in an animal cell, which provides a flexible but supportive framework for the cell. The endoplasmic reticulum in bacterial cells and the Golgi apparatus in plant cells are both involved in cellular organization and synthesis, but they do not play a role in providing structural support. The nucleus in a eukaryotic cell contains genetic material and regulates cellular processes but is not involved in providing physical structure.

Question 5

Which of the following statements is true of chloroplasts?

Accepted Answer

Chloroplasts are organelles found in plant and algae cells that are responsible for capturing energy from sunlight through the process of photosynthesis. This energy is then used to convert carbon dioxide and water into glucose and oxygen. Option A is incorrect because proteins are produced by ribosomes, not chloroplasts. Option C is incorrect because animal cells do not contain chloroplasts, and their shape is instead determined by their cytoskeleton and extra-cellular matrix. Option D is incorrect because the entire copy of a cell's genetic material is found in the nucleus, not in chloroplasts.

Question 6

A long piece of ribbon wired along both long edges is twisted into a helix and wrapped around individual pipe cleaners that have been rolled into spools;this grouping is then twisted (super coiled)again to condense it.This could be best used as a simple model for

Accepted Answer

The description matches the structure of a chromosome, where DNA (represented by the ribbon) is wrapped around proteins (represented by the pipe cleaners), and further coiled to condense it.

Question 7

The smallest and most basic units of life are microscopic,self-contained units enclosed by a water repelling membrane and are called ________.

Accepted Answer

The answer of The smallest and most basic units of...

Question 8

A cell containing a nucleus,mitochondria,Golgi apparatus,both smooth and rough ER,ribosomes,cytoskeleton,a large vacuole,and chloroplasts would be an example of a typical ________ cell.

Accepted Answer

The answer of A cell containing a nucleus,mitochondria,Golgi apparatus,both smooth...

Question 9

This figure depicts a transport protein in a plasma membrane.The dark blue molecules represent a protein that is being transported out of the cell.Is the transport of the protein active or passive? Support your answer by describing evidence visible in the figure and stating its significance regarding your answer.

Accepted Answer

The answer of This figure depicts a transport protein in...

Question 10

Label this plasma membrane.Use the following terms: cellular environment,external environment,plasma membrane,hydrophilic heads,hydrophobic tails,energy,water,sugar,transport proteins.

Accepted Answer

The answer of Label this plasma membrane.Use the following terms:...

Question 11

When scientists such as J.C.Venter and Daniel Gibson engineer a cell constructed with synthetic DNA in the laboratory,do they challenge accepted cell theory? If so,which part of cell theory do they challenge? Briefly explain your answer.

Accepted Answer

The answer of When scientists such as J.C.Venter and Daniel...

Question 12

All cells have a ________ that acts as a barrier separating the cellular components from the external environment.

Accepted Answer

The answer of All cells have a ________ that acts...

Question 13

Which of the following would be the best analogy for the function of the Golgi apparatus?

Accepted Answer

Just as a worker in a factory places labels on products and then packs them into a shipping box, the Golgi apparatus modifies, sorts, and packages proteins and lipids into vesicles for transport to their final destinations in the cell or secretion outside of the cell.

Question 14

In your own words,briefly point out the primary difference between prokaryotes and eukaryotes,and then explain what might keep viruses from being included in either of these categories.

Accepted Answer

The answer of In your own words,briefly point out the...

Question 15

There are cells in your pancreas that produce insulin,a peptide hormone important in the regulation of blood sugar levels by adjusting the metabolism of sugars and fats.Once the pancreas cells have produced the initial peptide (small string of amino acids)component of insulin,it must be finished,packaged,and shipped out of the cell.Which organelles would likely be involved in this process of finishing,packaging,and shipping of a peptide hormone? Include a brief,general description of what happens to the hormone at each organelle.

Accepted Answer

The answer of There are cells in your pancreas that...

Question 16

The leaves of a plant typically have different tissue layers that function in different ways.The epidermis layer functions like a covering of skin to protect the leaf while vascular bundles carry water and nutrients through the leaf.The palisade mesophyll layer is responsible for most of the photosynthesis that occurs while the spongy mesophyll layer underneath it aids in the exchange of gases (CO₂ and O₂)and water vapor.In which leaf tissues would you expect to find the highest density of chloroplasts?

Accepted Answer

The palisade mesophyll layer is responsible for the majority of photosynthesis that takes place in the leaf and therefore contains the highest concentration of chloroplasts. Chloroplasts are the organelles responsible for photosynthesis, so the tissue layer with the most chloroplasts will be the one where the most photosynthesis occurs.

Question 17

A solid waste (garbage)transfer facility that sorts and breaks down garbage into recyclables and waste to be thrown away in the landfill would be a suitable analogy for which cellular organelle?

Accepted Answer

The lysosome, like a transfer facility, sorts and breaks down material (in this case, waste products) into potentially recyclable materials or waste to be discarded.

Question 18

The endoplasmic reticulum (ER)is a single membrane continuous with the nuclear envelope and a series of interconnected sacs throughout the cell.Why might it be beneficial to the cell for the ER to be continuous with the nuclear envelope?

Accepted Answer

The connection between the ER and nuclear envelope would make it easier for messages to get from the nucleus to the ER where proteins and lipids are synthesized. This would most likely require the use of less energy and be a beneficial mechanism for the cell.

Question 19

Indicate which cell in this figure is the plant cell and which is the animal cell.Label all cellular structures 1-12 in both cells.Include a very brief description of each organelle's function with its label.Use an asterisk to indicate which structures are unique to plant cells.

Accepted Answer

The answer of Indicate which cell in this figure is...

Question 20

Viruses use their ________ material to take over their host cell's metabolic machinery to produce the components needed for the virus to reproduce.

Accepted Answer

The answer of Viruses use their ________ material to take...

Quiz 3: Life Is Cellular