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The Observations And Functions of The Plasma Membrane

Quiz 3

Part 1 of 6 - Chapter 3

24.0 Points

Question 1 of 33

3.0 Points

Which model best describes the observations and functions of the plasma membrane?

 
  •  

A. nuclear envelope

  •  

B. fluid mosaic model

  •  

C. cell membrane

  •  

D. phospholipid bilayer


Feedback:The model describes the plasma membrane as a fluid combination of phospholipids, cholesterol, proteins, and carbohydrates. Review the cell membrane in Chapter 3.

 

Question 2 of 33

3.0 Points

A phospholipid bilayer with embedded proteins that separate internal contents of a cell from the surrounding environment is referred to as what?

 
  •  

A. cytoplasm

  •  

B. cytoskeleton

  •  

C. plasma membrane

  •  

D. vacuole

  •  

E. lysosome


Feedback:Great job.

 

Question 3 of 33

3.0 Points

Which structure carries out oxidation reactions that break down fatty acids and amino acids?

 
  •  

A. mitochondria

  •  

B. ribosomes

  •  

C. peroxisomes

  •  

D. chloroplasts


Feedback:Great job.

 

Question 4 of 33

3.0 Points

Which is the only substance involved in osmosis?

 
  •  

A. sugar

  •  

B. salt

  •  

C. water

  •  

D. alcohol


Feedback:Great job.

 

Question 5 of 33

3.0 Points

If a substance must move up a concentration gradient, there is an input requirement of what from the cell?

 
  •  

A. 

NaCl

  •  

B. 

Sugar

  •  

C. 

H2O

  •  

D. 

ATP


Feedback:

Great job.

 

Question 6 of 33

3.0 Points

Light and dissecting microscopes are binocular. What does this mean?

 
  •  

A. They have two eye pieces, and one lens system

  •  

B. They have one eye piece, and one lens system

  •  

C. They have two separate lens systems, one for each eye

  •  

D. They have one lens system, that is split for each eye


Feedback:Great job.

 

Question 7 of 33

3.0 Points

Which is the animal cell’s garbage disposal?

 
  •  

A. vacuoles

  •  

B. nucleus

  •  

C. Golgi apparatus

  •  

D. lysosomes

  •  

E. endoplasmic reticulum


Feedback:Great job.

 

Question 8 of 33

3.0 Points

Which structure is responsible for protein synthesis, and is present in both eukaryotes and prokaryotes?

 
  •  

A. ribosomes

  •  

B. mitochondria

  •  

C. peroxisomes

  •  

D. chloroplasts


Feedback:Great job.

 

Part 2 of 6 - Chapter 4

24.0 Points

Question 9 of 33

3.0 Points

What kind of metabolic pathway takes small molecules and builds them into larger ones, requiring energy?

 
  •  

A. catabolic

  •  

B. anabolic

  •  

C. bioenergetics

  •  

D. metabolism


Feedback:Great job.

 

Question 10 of 33

3.0 Points

What kind of metabolic pathway breaks down large molecules into small ones, using energy?

 
  •  

A. metabolism

  •  

B. catabolic

  •  

C. anabolic

  •  

D. bioenergetics


Feedback:Great job.

 

Question 11 of 33

3.0 Points

What is the term for when an activator binds to an enzyme, which alters the active site so that the substrate is able to bind?

 
  •  

A. competitive inhibition

  •  

B. allosteric activation

  •  

C. active site

  •  

D. allosteric inhibition


Feedback:Great job.

 

Question 12 of 33

3.0 Points

If a molecule binds to an active site in an enzyme, but it is not involved in the reaction and is simply slowing it down, what is it called?

 
  •  

A. active site

  •  

B. competitive inhibition

  •  

C. substrate

  •  

D. enzyme


Feedback:Great job.

 

Question 13 of 33

3.0 Points

Rubisco is involved in photosynthesis, and helps to speed up the reaction from carbon dioxide to water. What is the generic term for rubisco?

 
  •  

A. exergonic

  •  

B. endergonic

  •  

C. substrate

  •  

D. enzyme


Feedback:Great job.

 

Question 14 of 33

3.0 Points

Why can’t cells store extra free energy?

 
  •  

A. they can store free energy, which is why we are able to survive

  •  

B. it would result in an increase of heat, which would denature enzymes

  •  

C. it would result in a lowering of heat, which would freeze the cells

  •  

D. it would result in a lack of space, which would keep out other molecules


Feedback:Great job.

 

Question 15 of 33

3.0 Points

What does the first law of thermodynamics state?

 
  •  

A. There is and always will be the exact same amount of energy in the universe.

  •  

B. If two systems are in equilibrium with a third, then they are in equilibrium with each other.

  •  

C. Entropy of an isolated system tends to increase.

  •  

D. As temperature approaches absolute zero, the entropy approaches a constant minimum.


Feedback:Great job.

 

Question 16 of 33

3.0 Points

What is the first step in the breakdown of glucose to extract energy for cell metabolism?

 
  •  

A. gluconeogenesis

  •  

B. TCA cycle

  •  

C. photosynthesis

  •  

D. glycolysis


Feedback:Great job.

 

Part 3 of 6 - Chapter 5

24.0 Points

Question 17 of 33

3.0 Points

What is the name of the pigment in plants that absorbs wavelengths from the red and blue portions of the visible spectrum?

 
  •  

A. 

chlorophyll a

  •  

B. 

chlorophyll b

  •  

C. 

carotenoids

  •  

D. 

glucose


Feedback:

There are many different pigments in plants, and each type can be identified by the specific pattern of wavelengths it absorbs from visible light. Review plant pigments in Chapter 5.

 

Question 18 of 33

3.0 Points

Which molecule leaves the Calvin cycle to be converted into glucose?

 
  •  

A. ADP

  •  

B. ATP

  •  

C. G3P

  •  

D. 3-PGA


Feedback:Great job!

 

Question 19 of 33

3.0 Points

What are the starting reactants of photosynthesis, along with the required input from the environment?

 
  •  

A. carbon dioxide, water, oxygen

  •  

B. sunlight, carbon dioxide, water

  •  

C. water, glucose, oxygen

  •  

D. sunlight, oxygen, water


Feedback:Great job!

 

Question 20 of 33

3.0 Points

Prokaryotes can also undergo photosynthesis, but lack membrane-bound organelles. What do they use instead?

 
  •  

A. Passageways in the nuclear envelope

  •  

B. Infoldings of the plasma membrane

  •  

C. Specialized structures that are not identified

  •  

D. Many mesophyll cells stacked together


Feedback:Great job!

 

Question 21 of 33

3.0 Points

There are three stages in the Calvin cycle; what are they in the proper order?

 
  •  

A. Loss of chlorophyll, Regeneration of RuBP, Reduction

  •  

B. Reduction, Loss of chlorophyll, Carotenoids

  •  

C. Reduction, Carbon Fixation, Loss of RuBP

  •  

D. Carbon Fixation, Reduction, Regeneration of RuBP


Feedback:Great job!

 

Question 22 of 33

3.0 Points

During the light-dependent reactions of photosynthesis, where does the oxygen come from?

 
  •  

A. the loss of sugar

  •  

B. the loss of pigment

  •  

C. the hydrolysis of glucose

  •  

D. the hydrolysis of water


Feedback:Great job!

 

Question 23 of 33

3.0 Points

In which organelle in plants do photosystems reside?

 
  •  

A. mitochondria

  •  

B. thylakoids

  •  

C. nucleus

  •  

D. ribosomes


Feedback:Great job!

 

Question 24 of 33

3.0 Points

What are the disc-shaped membranous structures inside of the chloroplast where the light-dependent reactions take place?

 
  •  

A. mesophyll

  •  

B. thylakoid

  •  

C. stroma

  •  

D. chloroplast


Feedback:Great job!

 

Part 4 of 6 - Lecture Material

12.0 Points

Question 25 of 33

3.0 Points

What is pili in prokaryotes?

 
  •  

A. a long whip-like structure that propels the cell into motion

  •  

B. made of two lipid layers which make the inside hydrophilic and the outside hydrophobic

  •  

C. area of cytoplasm that contain the DNA molecule

  •  

D. hair-like structures found on the surface of some prokaryotes

  •  

E. circular pieces of DNA that contain genes but not involved in cell reproduction


Feedback:Great job!

 

Question 26 of 33

3.0 Points

What is the plasmid in prokaryotes?

 
  •  

A. a long whip-like structure that propels the cell into motion

  •  

B. made of two lipid layers which make the inside hydrophilic and the outside hydrophobic

  •  

C. hair-like structures found on the surface of some prokaryotes

  •  

D. area of cytoplasm that contain the DNA molecule

  •  

E. circular pieces of DNA that contain genes but not involved in cell reproduction


Feedback:Great job!

 

Question 27 of 33

3.0 Points

What is the plasma membrane in prokaryotes?

 
  •  

A. a long whip-like structure that propels the cell into motion

  •  

B. area of cytoplasm that contain the DNA molecule

  •  

C. made of two lipid layers which make the inside hydrophilic and the outside hydrophobic

  •  

D. hair-like structures found on the surface of some prokaryotes

  •  

E. circular pieces of DNA that contain genes but not involved in cell reproduction


Feedback:Great job!

 

Question 28 of 33

3.0 Points

What is the nucleolus in eukaryotic cells?

 
  •  

A. it plays a role in capturing the energy of the sun to create carbohydrates or sugar

  •  

B. space in the middle of plant cells that contains water and macromolecule storage

  •  

C. it is found in side the nucleus, and makes ribosomes

  •  

D. it plays a role in the packaging and shipping of protein products

  •  

E. it is the site of RNA synthesis, and DNA storage


Feedback:Great job!

 

Part 5 of 6 - Part 3: Lab Lecture Material

12.0 Points

Question 29 of 33

3.0 Points

What is the term for an observable phenomenon in nature that is widely supported with empirical evidence; it tells us something happens, but not the why or how?

 
  •  

A. Null Hypothesis

  •  

B. Alternative Hypothesis

  •  

C. Scientific Law

  •  

D. Scientific Theory


Feedback:Correct! Evolution is a law, as we can’t see it.

 

Question 30 of 33

3.0 Points

What is a good generic definition of a hypothesis?

 
  •  

A. A prediction concerning a natural phenomenon based on personal observations in the natural world.

  •  

B. A combination of politics and scientific research to answer important questions for the general population.

  •  

C. A theory that can easily be proven by conducting a few simple experiments.

  •  

D. An educated guess or expected answer to a scientific question based on prior knowledge and observation.


Feedback:Correct! Remember, a hypothesis should be based on observation, but should also be objective.

 

Question 31 of 33

3.0 Points

A hypothesis should suggest a relationship between what two variables the researcher will test?

 
  •  

A. dependent and independent

  •  

B. independent and deductive

  •  

C. dependent and inductive

  •  

D. deductive and inductive


Feedback:Correct! There should be a link in the hypothesis between the variable that you are changing, and another that will be observed.

 

Question 32 of 33

3.0 Points

What is said of the hypothesis if the data gathered in an experiment is what is anticipated?

 
  •  

A. disproven

  •  

B. supported

  •  

C. rejected

  •  

D. proven


Feedback:Correct! The scientific method cannot prove or disprove a hypothesis directly.

 

Part 6 of 6 - Part 6 - 1 Question 4 points - 1 question

4.0 Points

Question 33 of 33

4.0 Points

The unified cell theory includes all of the following EXCEPT?

 
  •  

A. All living things are composed of one or more cells

  •  

B. Cells eat each other to reproduce

  •  

C. All new cells arise from existing cells

  •  

D. That the cell is the basic unit of life


Feedback:Great job.

 
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