Please TYPE your answers on separate paper and attach this sheet as a cover sheet. Drawings may be neatly hand rendered and labeled. Read and sign the academic integrity statement below.

NOTE: We encourage people to work and study together, but the final product should be an INDIVIDUAL effort. Discuss and talk over questions together, but write up your answers by yourself after the study session. When you use diagrams or concept maps, create your own rather copying those from the text or lecture materials. Definitions and explanations should be in your words and not those of the text book author or any other source.

Your job is to convince your instructor that YOU understand these ideas.

Work copied from others will not be accepted. Because answers will be posted on the web immediately after the due time, late work will not be accepted.

Academic Integrity in Biology 100/101

I have read and understand Part #4 of the University of Illinois Student Code, which deals with Academic Integrity.

Signature

_______________________________________

Please use the "Talk to Sarah and Ed" Forum in Moodle if you wish to discuss the assignment further.

Don't overlook the links to web resources and references to text pages below that might be useful in answering these questions. Activities in lecture, discussion, and laboratory classes will also address these questions

Completion of these questions will help you achieve most of the objectives for lectures #5, #7, and #8

1. Energy and Matter: (10 points)

An experiment was conducted in which lentil seeds were germinated and grown under various light durations. After a period of growth the plants were harvested and their fresh (wet) weight was measured. The plants were then dried in an oven to remove all the water and their dry weight was measured.

Plants grown entirely in the dark actually lost dry weight when compared to the original seed dry weight.

Plants grown in the light gained dry weight in proportion to the duration of the daily light period they experienced.

See the plants here.

See the Data Table here

Part a. Describe the relationship between the processes of respiration and photosynthesis in the growth of seedlings described above.

Why is there a negative growth rate in the seedlings grown in darkness compared to the positive rate of growth of those seedlings grown in light?

Include the following concepts in your explanation:

Photosynthesis	Biosynthesis	Respiration	Uptake of CO2
Release of CO2	Net Primary Production	Production of Biomass

(Your answer MUST BE IN YOUR OWN WORDS and must convince us that you understand the relationships among these concepts. Simply listing text book definitions of these individual concepts will be insufficient.)

Part b. Explain why matter (carbon, nitrogen, phosphorus, etc.) is considered to cycle in an ecosystem while energy flows through an ecosystem. Your answer should include an explanation of the concepts of:

• the rule of tens and decomposition

• Specifically describe the role of decomposers in the cycling of minerals.

• What are the decomposers getting out of decomposition?

• FROM where and in what form does energy enter the living part of the ecosystem?

• TO where and in what form does energy eventually flow when it leaves the living part of the ecosystem?

2. Photosynthesis and Respiration (10 points)

Part a. Draw your own sketches of part of a plant cell including a chloroplast, a mitochondrion, and part of the cytoplasm.  Include the internal membrane structure of the chloroplast and mitochondrion in your drawing.

Note: Your drawing should be original, not a copy of a drawing from the text or any other source. The drawing doesn't have to be wonderful, but it should clearly illustrate your understanding of the structures of chloroplasts and mitochondria.

Include and label these structures in your drawing:

cytoplasm	chloroplast	stroma
thylakoid membrane	grana	mitochondrion
outer membrane	inner membrane	matrix
intermembrane compartment

Part b. Indicate on your drawing where each process in the table below occurs. Indicate the cytoplasm or specifically where in which organelle each process occurs.

1. Light dependent reactions	2. Calvin cycle	3. Glycolysis
4. Krebs cycle	5. Electron Transport Chain of Respiration

Part c. Prepare a table that lists the raw materials and products of the 5 processes in the table above. List the processes in chronological order starting with the first process of photosynthesis and ending with the last process of respiration.