Chapter 4 Online Activities and
Reinforcement (Sections 4.1, 4.2, 4.4)
A. On classzone.com, go to Interactive Review, Go to
“Chapter 4: Cells and Energy”, Click on Vocabulary
Games, and then on Word Scramble. Our focus is 4.1, 4.2
and 4.4 only, so the terms listed on this section are only from
these sections. (Note: for Word Scramble concepts that are
not on our terms list below, give them a try, but you will not
be responsible for them in our study).
Definitions
____1.Anaerobic process in which glucose is broken down into
two molecules of pyruvate and two net ATP are produced
____2. Light absorbing pigment molecules in photosynthetic organisms
___3. High Energy molecule that contains, within its bonds, energy
that cells can use
___4. Product of fermentation in many types of cells, including human
muscle cells (they make the muscles feel stiff and sore)
Terms
a. ATP
b. chlorophyll
c. anaerobic
d. ADP
e. Glycolysis
f. lactic acid
g. thylakoid
h. aerobic
i. Krebs Cycle
___5. Low energy molecule that can be converted to ATP
___6. Process during cellular respiration that breaks down a carbon
molecule to produce molecules that are used in the electron transport chain
___7. Process that requires oxygen to occur
___8. process that does not require oxygen to occur
___9. Membrane bound structure within chloroplasts that contain chlorophyll and other light-absorbing
pigments used in the light-dependent reactions of photosynthesis
-------------------------------------------------------------------------------------------------------B. On Classzone, go to “Research Center” and then click on “Resource Center”.
Go to “Unit 2 Cells” and then under Chapter 4, click on “Habitats:
Hydrothermal Vents”. (You can also find it at:
http://www.botos.com/marine/vents01.html
1. Scroll down to “Story”. Define a hydrothermal vent, and when and where
was the first found?
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2. Creatures that live at great ocean depths cannot undergo photosynthesis. Why?
3. Since deep ocean dwellers cannot depend on photosynthesizing plants for food, how do they get
food?
4. It does not seem possible that hydrothermal vent tubeworms can live without a mouth or digestive
system. How do these miracles of nature prosper?
5. __________________ bacteria use sulfur compounds in vent water to produce food for
communities of unusual animals, many of which are new species found only around vents. Some of
these organisms produce ____________ and carcinogens that could be used to further our
understanding of biological processes and improve human health.
6. Take the Quick Quiz: How many questions did you get correct out of 5? __________
-------------------------------------------------------------------------------------------------------------------------------------------C. On classzone.com, click on “Webquest” under ACTIVITIES. Click on “Unit 2 Cells.” Click on
“Chapter 4: Energy and Athletic Training.” We will be completing a modified version of this activity.
1. Read the introduction. Biologically, why do your muscles start to burn if you sprint for the bus or for
a touchdown at a Patriots football game?
2. Read the Task. Then read “Resources and Responses”, Step1, Step 2 and Evidence.”
3. Go to “Training in the Clouds” and answer the following questions:
a. What is blood doping? Why would an athlete do it?
b. Does it work? How do we know?
c. Is blood doping safe? Is it allowed in completion? Why or why not?
d. What is the “live high, train low” method that some athletes are using instead?
Is it allowed? Does it work? Explain.
4. Go to “Boxing for Fitness” to answer the following. Scroll to “A Brief Look at Energy Systems”.
a. What provides the energy for all of our muscular contractions?
b. When ATP gets broken down into ___________, Energy is released.
c. What is the main reason we should exercise aerobically?
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d. At really high levels of activity, the body cannot provide enough oxygen to fuel the muscles.
However, an “anaerobic exercise” proceeds without ___________________.
e. In lactic acid systems, the muscles get fatigued because of an increase in muscle
_________________. The reason you have sore muscles after an intense exercise is that it takes 15-20
minutes to remove _____________the concentration of lactic acid formed in the exercise.
f. According to this website, is it possible for an athlete to delay fatigue by
increasing his / her tolerance to lactic acid build up? Explain.
5. On your Classzone Webquest page, click on the “Conclusion” tab and fill in the
blanks.
We eat ______________and breathe _______________so that our cells can
produce usable _________________to perform daily activities. Cells use both
________________ (utilizes oxygen) and ________________ (does not utilize oxygen) methods to
produce a very important molecule called________.
-----------------------------------------------------------------------------------------------------------------------------------------D. On the classzone.com website, click on “Assessment.” Complete the Section quizzes for Chapter 4.1,
4.2, and 4.4 and answer the following questions.
Section 4.1 Quiz
1. ADP + _________________  ATP. This process requires energy.
2. Chemosynthetic organisms use ______________energy instead of light energy to make food.
3. Energy is released from this molecule by:
Section 4.2 Quiz
4. ___________________(a pigment) helps the process of photosynthesis by absorbing some of the
energy from visible light.
5. The light dependent reactions of photosynthesis make ___________________, an important
substance animals use in respiration.
6. Do the light independent and light dependent reactions occur in different places in the
chloroplast? Explain.
Section 4.4 Quiz
7. Glycolysis takes place in the cell’s cytoplasm and processes glucose (simple
sugar) into products the Kreb’s Cycle can use. Indicate (on the illustration)
where the Krebs Cycle occurs.
8. Glycolysis is ________________; it does not need oxygen to take place.
9. What does the Kreb’s Cycle produce? ___________________(a waste product) and
___________________(these are passed on to the next stage of cellular respiration to harvest
more energy)
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10. Return to Classzone.com.
E. Click on “Biozine”. In the search bar, type in “Sometimes Even Algae Gets Sunburned” and click
on the article. Read this short article and answer the following questions:
1. What do plants and photosynthetic algae rely on for a source of energy for photosynthesis?
2. When plants receive an excess of light, what happens to their photosynthetic light sensitive
pigments?
3. How have red algae adapted to deal with too much UV radiation?
4. Humans produce ____________to absorb UV radiation and protect the skin. What types of
substances do the algae form?
5. Photosynthetic plants and algae have developed great ways of protecting themselves from
excessive sun’s rays. These mechanisms have not functioned properly in the recent past. Why?
6. Specifically, how does the short-wave UV radiation harm algae?
7. Overall, how are marine ecosystems being impacted from ozone layer depletion and its effects
on algae?
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