Introduction To Life Science

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Question 1

During the Calvin-Benson cycle (carbon-fixing reactions), in the red Columbine plant, high-energy electrons are transferred into a newly made 3-carbon compound. Eventually, these electrons will end up as part of glucose molecules. What was the original source of these electrons in photosynthesis?

  A. glucose
  B. carbon dioxide.
  C. oxygen
  D. ATP
  E. water

5 points

Question 2

A stone is pushed from the top of a hill. Halfway to the bottom of the hill, this rolling stone

  A. is constantly gaining more energy.
  B. has both potential energy and kinetic energy.
  C. is using up chemical energy.
  D. has potential energy only.
  E. has kinetic energy only.

5 points

Question 3

The role of oxygen in cellular respiration is to

  A. act as the final electron acceptor.
  B. supply an energy molecule.
  C. aid in the transport of pyruvate into the mitochondria.
  D. allow glycolysis to continue.
  E. combine with carbon atoms to form carbon dioxide.

5 points

Question 4

Surface tension of water is due to

  A. ionic bonding.
  B. water molecules repelling each other.
  C. the ability of water to act as a solvent.
  D. hydrogen bonding.
  E. ionization of water.

5 points

Question 5

With few exceptions, organic compounds are those that contain

  A. nitrogen.
  B. carbon.
  C. hydrogen.
  D. ocygen.
  E. all of the above.

5 points

Question 6

Most cells are small. When they reach a certain size, cells typically divide. This has to do with the

  A. fact that they cannot possess sufficient numbers of organelles for normal cell functioning.
  B. differences between viral particles and eukaryotic cells.
  C. surface-to-volume ratio.
  D. amount of genetic material.
  E. inability to produce more components of the cell membrane.

5 points

Question 7

The majority of ATP produced in cellular respiration is produced during

  A. the Krebs cycle.
  B. glycolysis.
  C. the electron transport chain.
  D. anaerobic processes.
  E. fermentation.

5 points

Question 8

In a cell,

  A. energy-releasing reactions are coupled to energy-absorbing reactions.
  B. energy-absorbing reactions and energy-releasing reactions are unlinked.
  C. energy-absorbing reactions are coupled to energy-releasing reactions via electron carriers.
  D. there are many more energy-absorbing reactions than energy-releasing reactions.
  E. more energy is used up than is produced.

5 points

Question 9

What method is often used by cells to move large solid material into the cell?

  A. facilitated diffusion.
  B. phagocytosis.
  C. simple diffusion.
  D. exocytosis.
  E. active transport.

5 points

Question 10

Rank the following chemical bonds from weakest to strongest:

  A. hydrogen, ionic, covalent
  B. ionic, hydrogen, covalent
  C. hydrogen, covalent, ionic
  D. ionic, covalent, hydrogen
  E. covalent, ionic, hydrogen

5 points

Question 11

Because the shared electrons between hydrogen and oxygen spend more time orbiting the oxygen than the hydrogen, water is

  A. a nonpolar molecule.
  B. a charged molecule.
  C. a polar molecule.
  D. a neutral molecule.

5 points

Question 12

A hummingbird is “drinking” nectar containing sugar from a red columbine flower. Arrange the following events to occur in the hummingbird in order from the first to last:

Glucose sugar is converted to pyruvate.

Energy from high-energy electrons is released from an electron transport chain. This energy is used to make ATP.

The hummingbird exhales carbon dioxide and energy is stored in electron carriers.

The hummingbird has the ability to beat its wings 40 – 80 times a second.

  A. 2, 3, 4, 1
  B. 1, 3, 2, 4
  C. 1, 2, 3, 4
  D. 1, 4, 3, 2
  E. 2, 1, 3, 4

5 points

Question 13

In photosynthesis, the light-dependent reactions

  A. can take place day or night.
  B. produce ADP and carbon dioxide.
  C. produce ATP and energy stored in electron carriers.
  D. are uncoupled from the light-independent reactions.
  E. lead to carbon fixation.

5 points

Question 14

All enzymes act by

  A. allowing products to be changed during the chemical reactions.
  B. raising the activation energy of specific chemical reactions.
  C. breaking hydrogen bonds between molecules.
  D. breaking and forming ionic bonds between ions.
  E. lowering the activation energy of specific chemical reactions.

5 points

Question 15

This element is prominent in both living organisms and in the Earth’s surface.

  A. silicon
  B. oxygen
  C. carbon
  D. aluminum
  E. hydrogen

5 points

Question 16

The atomic nucleus consists of

  A. neutrons and electrons.
  B. neutrons only.
  C. protons only.
  D. neutrons and protons.
  E. protons and electrons

5 points

Question 17

Because of the atomic structure of carbon, it tends to form

  A. bonds only with hydrogen.
  B. ionic bonds.
  C. covalent bonds.
  D. sulfide bonds.
  E. hydrogen bonds.

5 points

Question 18

The most common energy-carrying molecule in the cell is

  A. ATP.
  B. adenine.
  C. DNA.
  D. AMP.
  E. ADP.

5 points

Question 19

The internal pH of most cells is near neutral. This allows

  A. the buffers produced within the body to affect these cells.
  B. enzymes within the cell to act at peak efficiency.
  C. rapid fluctuations between acidic and basic conditions within the cells.
  D. water to break down into H+ and OH-.
  E. enzymes outside of these cells to function.

5 points

Question 20

As one form of energy is converted into another, there is always some energy lost as

  A. light.
  B. heat.
  C. kinetic energy.
  D. chemical energy.
  E. activation energy.

Question 1

 

During the Calvin

–

Benson cycle (carbon

–

fixing reactions), in the red Columbine plant, high

–

energy

electrons are transferred into a newly made 3

–

carbon compound. Eventually, these electrons will end up

as part of glucose molecules. What was the original sou

rce of these electrons in photosynthesis?

 

 

A.

 

glucose

 

 

B.

 

carbon dioxide.

 

 

C.

 

oxygen

 

 

D.

 

ATP

 

 

E.

 

water

 

5 points

 

 

 

Question 2

 

A stone is pushed from the top of a hill. Halfway to the bottom of the hill, this rolling stone

 

 

A.

 

is constantly gaining more energy.

 

 

B.

 

has both potential energy and kinetic energy.

 

 

C.

 

is using up chemical energy.

 

 

D.

 

has potential energy only.

 

 

E.

 

has kin

etic energy only.

 

5 points

 

 

 

Question 3

 

The role of oxygen in cellular respiration is to

 

 

A.

 

act as the final electron acceptor.

 

 

B.

 

supply an energy molecule.

 

 

C.

 

aid in the transport of pyruvate into the mitochondria.

 

 

D.

 

allow glycolysis to continue.

 

 

E.

 

combine with carbon atoms to form carbon dioxide.

 

Question 1

During the Calvin-Benson cycle (carbon-fixing reactions), in the red Columbine plant, high-energy

electrons are transferred into a newly made 3-carbon compound. Eventually, these electrons will end up

as part of glucose molecules. What was the original source of these electrons in photosynthesis?

 

A. glucose

 

B. carbon dioxide.

 

C. oxygen

 

D. ATP

 

E. water

5 points

Question 2

A stone is pushed from the top of a hill. Halfway to the bottom of the hill, this rolling stone

 

A. is constantly gaining more energy.

 

B. has both potential energy and kinetic energy.

 

C. is using up chemical energy.

 

D. has potential energy only.

 

E. has kinetic energy only.

5 points

Question 3

The role of oxygen in cellular respiration is to

 

A. act as the final electron acceptor.

 

B. supply an energy molecule.

 

C. aid in the transport of pyruvate into the mitochondria.

 

D. allow glycolysis to continue.

 

E. combine with carbon atoms to form carbon dioxide.

Energy Sources And Alternative Energy Lab

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Carefully review the Grading Rubric before beginning the assignment.

Read “Lab 4: Energy Sources and Alternative Energy.” This lab will allow you to investigate the effects of acid mine drainage through experimentation. Additionally, it will allow for the exploration of solar energy through the use of a solar cell motor. Then, you will utilize this information and your eScience lab kit to complete Experiments 1 and 2 on the Week Four Lab Reporting Form. Make sure to complete all of the following items before submission::

  1. Read through introductory material.
  2. Perform Experiment 1: The Effects of Coal Mining using your eScience lab manual and kit.
  3. Complete Table 1 and answer the Post Lab Questions 1 through 4 in complete sentences on the Week Four Lab Reporting Form.
  4. Perform Experiment 2: Solar Energy using your eScience lab manual and kit.
  5. Complete Table 2 and answer Post Lab Questions 1 through 5 in complete sentences on the Week Four Lab Reporting Form.

Submit the Week Four Lab Reporting Form via Waypoint. The document does not need to include a title page or other APA formatting; however, any outside sources utilized in your answers must be referenced in proper APA format

image1.jpg

Lab 4 – Energy Sources and Alternative Energy

Experiment 1: The Effects of Coal Mining

Table 1: pH of Water Samples
Water Sample Initial pH Final pH (24-48 hours)
Pyrite  

  
Activated Carbon  

  
Water  

  

POST LAB QUESTIONS

1. Develop hypotheses predicting the effect of pyrite and coal on the acidity of water?

a. Pyrite hypothesis =

b. Coal hypothesis =

2. Based on the results of your experiment, would you reject or accept each hypothesis that you produced in question 1? Explain how you determined this.

a. Pyrite hypothesis accept/reject =

b. Coal hypothesis accept/reject =

3. Based on your data, what effect do you predict coal mining has on the environment?

Answer =

4. What can be done to prevent mine drainage from damaging the ecosystem? Utilize at least one scholarly resource to support your suggestions.

Answer =

Experiment 2: Solar Energy

Table 2: Solar Energy Experiment Results
Environmental Descriptor/Variable Observations

(Each should be compared against direct subnlight)
Weather of the Day  
Motor speed in direct sunlight  
Motor speed at 45 degree angle  
Motor speed under reflectors  
Motor speed with 25% shaded  
Motor speed with 50% shaded  
Motor speed with 75% shaded  
Motor speed under red filtration  
Motor speed under blue filtration  
Motor speed under green filtration  
Motor speed under yellow filtration  

Post-Lab Questions

1. Develop hypotheses predicting the efficiency of solar energy from direct sunlight against the 4 variables tested?

Direct vs indirect hypothesis =

Direct vs reflected hypothesis =

Direct vs shaded hypothesis =

Direct vs filtered hypothesis =

2. Based on the results of your experiment, would you reject or accept each hypothesis that you produced in question 1? Explain how you determined this.

Direct vs indirect accept/reject =

Direct vs reflected accept/reject =

Direct vs shaded accept/reject =

Direct vs filtered accept/reject =

3. Does increased exposure to the sun’s light produce more current? Explain how you know this based on your data?

Answer =

4. How could you increase the electricity generated by a solar cell during the day, when the sun’s angle is constantly changing?

Answer =

5. Based on your data, could adding filters to solar panels increase the solar energy produced? Explain how you know this.

Answer =

References

Any sources utilized should be listed here.

© eScience Labs, 2013

Determining in the most cost-effective computer for your business;

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Assignment 1: Applications of the Scientific Method

 

The scientific method is useful in problem solving and decision-making in a wide variety of fields. In this assignment, you will demonstrate how to use the scientific method to make decisions and solve problems in your field of study or everyday life.

 

Identify a specific problem often faced in your field of study or everyday life. Research your problem and assess your data / research.

 

Information Systems and Technology

The use of personal electronic devices for work purpose, or

Determining in the most cost-effective computer for your business;

 

Write a three to five (3-5) page paper in which you:

  1. Explain the scientific method and describe the overall manner in which you would apply it in your field of study or everyday life.
  2. Propose one (1) testable hypothesis to explain / solve the problem you have selected. State the expected outcomes of your actions and include criteria for determining whether or not these actions would succeed. Note: Your hypothesis should be stated very precisely.
  3. Describe the main actions that you intend to put into place to test the hypothesis that you proposed in Question 2. Describe the way in which you would evaluate the success of your program. Include the results that you would deem as a success and the results that would be considered a failure.
  4. Discuss the wisdom behind the strategy you would use to test the hypothesis from Question 3, and describe the additional steps you might take, depending on the results of your test. Note: These additional steps might be to revise your original hypothesis (if the results were unsatisfactory) or to propose new hypotheses. The goal is to continuously improve your understanding of the factors influencing your outcomes, to be able to achieve greater results over time.
  5. Use at least two (2) quality resources / references in this assignment. Note: Wikipedia and personal blogs do not qualify as quality resources.

Management science involves the philosophy of approaching a problem in a subjective manner.

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1) Management science involves the philosophy of approaching a problem in a subjective manner.

 

2) Management science techniques can be applied only to business and military organizations.

 

3) Management scientists use the terms “data” and “information” interchangeably–that is, the two terms mean the same thing

 

4) A management science solution can be either a recommended decision or information that helps a manager make a decision

 

5) A variable is a value that is usually a coefficient of a parameter in an equation.

 

6) Parameters are known, constant values that are usually coefficients of variables in equations.

 

7) Data are pieces of information from the problem environment.

 

8) A model is a mathematical representation of a problem situation including variables, parameters, and equations.

 

9) A management science technique usually applies to a specific model type.

 

10) The first step of the management science process is to define the problem.