Interconnected Membranous Tubules

Part 1 of 6 - Chapter 3

24.0 Points

Question 1 of 33

3.0 Points

Which is a series of interconnected membranous tubules that collectively modify proteins and synthesize lipids?

 

A. lysosome

B. Golgi apparatus

C. endoplasmic reticulum

D. vacuole

E. nucleus

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Question 2 of 33

3.0 Points

What comprises the contents of a cell between the plasma membrane and the nuclear envelope?

 

A. plasma membrane

B. cytoplasm

C. vacuole

D. lysosome

E. cytoskeleton

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Question 3 of 33

3.0 Points

In an electron microscope, what type of cells are used?

 

A. live, processed cells

B. live and fresh cells

C. dead, but fresh cells

D. dead, processed cells

Feedback: The processing and prep for electron microscopy kills the cells, and it is usually done in a vacuum. Review microscopy in Chapter 3.

 

Question 4 of 33

3.0 Points

Which is the animal cell’s garbage disposal?

 

A. Golgi apparatus

B. nucleus

C. vacuoles

D. endoplasmic reticulum

E. lysosomes

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Question 5 of 33

3.0 Points

One feature of a prokaryote that is not found in a eukaryote includes what?

 

A. DNA

B. a plasma membrane

C. lack of nucleus

D. ribosomes

E. cytoplasm

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Question 6 of 33

3.0 Points

Which is typically the most prominent organelle in a eukaryotic cell?

 

A. peroxisome

B. nucleus

C. lysosome

D. mitochondria

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Question 7 of 33

3.0 Points

Cells that communicate with each other by direct contact use what?

 

A. intercellular junctions

B. plasma membrane

C. central vacuole

D. endoplasmic reticulum

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Question 8 of 33

3.0 Points

One feature of a eukaryote that is not found in a prokaryote includes what?

 

A. a plasma membrane

B. ribosomes

C. membrane-bound organelles

D. DNA

E. cytoplasm

Feedback: One major difference, that sets prokaryotes apart, is the lack of membrane bound organelles. Review components of prokaryotic cells in Chapter 3.

 

Part 2 of 6 - Chapter 4

24.0 Points

Question 9 of 33

3.0 Points

Reactions that release free energy are called what?

 

A. exergonic

B. endergonic

C. potential

D. kinetic

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Question 10 of 33

3.0 Points

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

 

A. photosynthesis

B. gluconeogenesis

C. TCA cycle

D. glycolysis

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Question 11 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

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Question 12 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. endergonic

B. enzyme

C. exergonic

D. substrate

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Question 13 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. As temperature approaches absolute zero, the entropy approaches a constant minimum.

C. Entropy of an isolated system tends to increase.

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

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Question 14 of 33

3.0 Points

What kind of energy does a slow moving wrecking ball contain?

 

A. heat energy

B. potential energy

C. kinetic energy

D. light energy

E. chemical energy

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Question 15 of 33

3.0 Points

Why can’t cells store extra free energy?

 

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

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

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

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

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Question 16 of 33

3.0 Points

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

 

A. anabolic

B. bioenergetics

C. metabolism

D. catabolic

Feedback: Metabolism is composed of synthesis (anabolism) and degradation (catabolism). Review energy and metabolism in Chapter 4.

 

Part 3 of 6 - Chapter 5

24.0 Points

Question 17 of 33

3.0 Points

On hot, dry days, plants normally close their stomata to conserve water. What effect would this have on photosynthesis?

 

A. It would decrease.

B. It would increase.

C. It would remain the same.

D. It would stop altogether.

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Question 18 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. stroma

C. chloroplast

D. thylakoid

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Question 19 of 33

3.0 Points

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

 

A. water, glucose, oxygen

B. carbon dioxide, water, oxygen

C. sunlight, oxygen, water

D. sunlight, carbon dioxide, water

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Question 20 of 33

3.0 Points

What are the two main byproducts of photosynthesis?

 

A. Carbon Dioxide and Oxygen

B. Carbon Dioxide and Water

C. Glucose and Oxygen

D. Glucose and Carbon Dioxide

E. Oxygen and Water

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Question 21 of 33

3.0 Points

What is the cause of the electrochemical gradient in the thylakoid space?

 

A. a buildup of hydrogen ions causing a difference in charge across the thylakoid membrane

B. a loss of oxygen through the stomata causing a shortage in the mesophyll cells

C. a loss of carbon dioxide through the stomata causing a shortage in the mesophyll cells

D. a buildup of glucose causing a difference in the charge across the thylakoid membrane

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Question 22 of 33

3.0 Points

What is the overall purpose of cellular respiration in photosynthetic organisms?

 

A. to breathe the oxygen from the air efficiently

B. to release glucose into the environment

C. to harvest the energy they have stored in carbohydrates

D. to allow cells to fold on to one another

Feedback: Cellular respiration can be thought of as the opposite of photosynthesis, but is a way for plants to use their stored energy. See the energy cycle in Chapter 5.

 

Question 23 of 33

3.0 Points

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

 

A. the hydrolysis of glucose

B. the hydrolysis of water

C. the loss of pigment

D. the loss of sugar

Feedback: When chlorophyll donates an electron, it has to be replaced with a hydrogen ion, which comes from the splitting of water, resulting in the release of oxygen. Review the light-dependent reactions of photosynthesis in Chapter 5.

 

Question 24 of 33

3.0 Points

In what organelle does all photosynthesis takes place in plants?

 

A.

vaculoe

B.

lysosome

C. mitochondrion

D.

chloroplast

E.

nucleus

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Part 4 of 6 - Lecture Material

12.0 Points

Question 25 of 33

3.0 Points

What is the jelly-like matrix in both prokaryotes and eukaryotes that provides form to the cell and holds many of the organelles?

 

A. cytoplasm

B. plasma membrane

C. DNA

D. ribosomes

Feedback: The plasma membrane holds all components in the cell, the DNA contains the important genetic material, and the ribosomes is the site of biological protein synthesis. Review Types of Cells and Their Similarities in the Weekly Lecture Lesson.

 

Question 26 of 33

3.0 Points

Why is the mitochondria so important to a eukaryotic cell?

 

A. it is the site of RNA synthesis and DNA storage

B. they are involved in transport of molecules

C. they create energy from basic sugar molecules

D. they are only found in eukaryotes

E. they play a role in protein synthesis

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

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

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

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Question 28 of 33

3.0 Points

What is the golgi apparatus in eukaryotic cells?

 

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

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

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

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

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

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Part 5 of 6 - Part 3: Lab Lecture Material

12.0 Points

Question 29 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 theory that can easily be proven by conducting a few simple experiments.

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

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

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

 

Question 30 of 33

3.0 Points

Which hypothesis states that no statistical significance exists between the independent and dependent variable?

 

A. null hypothesis

B. simple hypothesis

C. statistical hypothesis

D. alternative hypothesis

E. complex hypothesis

Feedback: Correct!

 

Question 31 of 33

3.0 Points

What is the term for a natural phenomenon that is generally accepted due to a large body of empirical data through repeated experiments; it usually describes how or why something happens?

 

A. Null Hypothesis

B. Alternative Hypothesis

C. Scientific Theory

D. Scientific Law

Feedback: Correct! Natural selection is a theory, as it explains the law of evolution.

 

Question 32 of 33

3.0 Points

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

 

A. dependent and independent

B. deductive and inductive

C. dependent and inductive

D. independent and deductive

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

 

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 new cells arise from existing cells

B. Cells eat each other to reproduce

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

D. That the cell is the basic unit of life

Feedback: Great job.


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