Download Cell Structure and Function, Cell Membrane and Cell Division Cell

Cell Pictures A,B,C, Celery in 100ml salt water
Celery in 100 ml fresh water
Station #1: Cell Structure and Function, Cell Membrane and Cell Division
Cell Structure and Function
Read the Cells and Cell Structure study guide.
Answer the following questions after completing your reading.
1. What cell organelle produces energy (ATP) for an apple tree to grow?
a. Mitochondrion
b. Cytoplasm
c. Ribosome
d. Nucleus
2. The function of the chloroplast is to
a. Convert light energy to chemical energy in both plants and animals
b. Convert light energy to chemical energy in plants
c. Convert chemical energy into glucose in plants
d. Convert chemical energy into mechanical energy
3.
The main function of the cell wall is to
a. Maintain homeostasis
b. Allow for the transport of ions against the concentration gradient
c. Provide rigidity and support for the cell
d. Allow for cell to cell communication
4. When a cell contains a large amount of ribosomes, that cell likely specializes in the production of
a. Lipids
b. Proteins
c. Hormones
d. Ions
5. If a blue stain that stains DNA were injected into a cell, which organelle would appear blue?
a. Lysosome
b. Golgi Body
c. Nucleus
d. Ribosome
6. Cell organelles are located within the ________of the cell.
a. Nucleus
b. Chloroplast
c. Cell membrane
d. Lysosomes
7. What is the function of the vacuole?
a. To break down waste
b. To store food or water
c. To make protein
d. To allow for cell to cell communication
8. The function of chromosomes in a cell is to
a. synthesize proteins
b. break down lipids
c. store genetic information
d. maintain homeostasis
Do This
1.
Observe the three microscopic pictures of cells A, B, and C. Fill in the table below:
Plant or
Animal Cell?
Evidence to support if cell is plant or animal based on what you see
Cell A
Cell B
Cell C
1.
Below are a list of organelles that you may not be able to see that this level of magnification. Determine if these
organelles exist in a plant or animal cell and then describe the function of these organelles in the table below.
Cell Part
Plant or Animal
Cell?
Function of this organelle in the cell
Nucleus
Cell Membrane
Chloroplast
Mitochondria
Ribosome
Cell Membrane
Read the Cell Transport and Homeostasis study guide.
Answer the following questions after completing your reading.
9. If a red blood cell is placed in a solution of salt water, the cell will
a. stay the same size
b. gain water and get larger
c. lose water and get smaller
d. nothing
10. An animal cell membrane lacking embedded proteins would likely be impaired of which function?
a. transporting large molecules across the cell membrane
b. enzyme production
c. maintaining fluidity of the phospholipid bilayer
d. send out spindle fibers from the centrioles
11. Salmonberry plant roots absorb minerals. What cellular process moves minerals across root cell
membranes from an area of low mineral concentration to an area of high mineral concentration?
a. Facilitated diffusion
b. Passive transport
c. Active transport
d. Osmosis
12. Membrane transport that occurs without the input of extra energy can be classified as what type of
transport?
a. passive
b. active
c. catalytic
d. inhibitory
13. Chamber A contains 40% helium and Chamber B contains 20% helium. Chambers are connected by a
tube the molecules are free to cross. Which of the following will occur?
a. some helium will move from chamber A to chamber B
b. some helium will move from chamber B to chamber A
c. helium will remain concentrated in chamber A
d. all of the helium will move into chamber B
14. The cell membrane composed primarily of what two biological molecules?
a. sugars and lipids
b. carbohydrates and proteins
c. proteins and lipids
d. sugars and proteins
15. The cell membrane is important for which of the following biological processes?
a. stabilization of electromagnetic cellular impulses
b. delayed response to stimuli
c. maintenance of body temperature
d. regulation of the flow of materials into and out of the cell
New Zealand Mud Snails
Directions: Use the following information to answer questions 1 through 6
The New Zealand Mud snail (Potamopyrgus antipodarum) was accidentally introduced into Capitol Lake in the
fall of 2009. Since then several native species of snails have become endangered. Right now, the city of
Olympia is trying to figure out how to get rid of this invasive species. Celeste and Aaron know that freshwater
snails cannot survive for very long in salt water. To determine if flushing capital Lake with salt water would be
a possible way to get rid of New Zealand Mud Snails in Capital Lake, Celeste and Aaron investigated the effect
of different concentrations of saltwater on the number of deaths of New Zealand Mud Snails.
Question: What is the effect of different saltwater solutions on the number of mud snail deaths in one week?
Prediction: As the salinity (percent saltwater) increases, more mud snails will die.
Materials:
20 New Zealand Mud snails
4 test tubes
0.5% saltwater solution
1.5% saltwater solution
2.5% saltwater solution
3.5% saltwater solution
Investigation Setup
Test tube A: 0.5% salt
Test tube B: 1.5% salt
Test tube C: 2.5% salt
Test Tube D: 3.5% salt
Procedure:
1. Label four test tubes, one for each saltwater concentration A-D.
2. Put 10 ml of 0.5% saltwater into test tube A, 10 ml of 1.5% saltwater into test tube B, 10 ml of 2.5%
saltwater into test tube C, and 10 ml of 3.5% saltwater into test tube D.
3. Add 5 New Zealand Mud Snails to each test tube.
4. Leave the New Zealand Mud Snails in the test tubes for 1 week.
5. Monitor the room temperature to make sure the temperature remains the same throughout the
investigation
6. Count and record how many snails die in each test tube at the end of the week.
7. Clean all test tubes and obtain new snails.
8. Repeat steps 1-4 three times for trials 2 and 3.
9. Calculate and record the average number of snail deaths for each salt concentration.
1. Celeste and Aaron now wonder if the temperature of fresh water will affect the number of New Zealand Mud Snail
deaths per week. Write a procedure for them to answer the question in the box. You may use any materials in your
procedure.
Be sure your procedure includes

logical steps to do the experiment




two controlled (kept the same) variables
one manipulated (independent) variable
one responding (dependent) variable
how often measurements should be taken and recorded
Question: What is the effect of different temperatures of fresh water on the number of
New Zealand Mud Snail deaths in one week?
Procedure:
Do This
1.
Observe the two celery stalks. One has been sitting overnight in 100 ml of saltwater and the other overnight in
fresh water. Sketch the 2 celery stalks below. Use arrows in your drawing to show the direction of water
movement at the cellular level.
Celery in Water
Celery in Salt Water
16. Provide a scientific explanation as to why they appear different. Use each of the following terms in your
explanation: osmosis, plasma membrane, lower concentration, higher concentration, salt, water, equilibrium
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Blue and red crayon pencils, cell cards
Meiosis and Fertilization diagram
Cell Division
Read Cell Division & Cell Cycle and Reproduction & Meiosis study guides.
Answer the questions below after completing the reading.
1. Mitosis is the process
a. In which the genetic information is copied and each of two new cells receive chromosomes that
vary in comparison to the parent.
b. ensures that cells form with half the original DNA
c. that creates two cells each the same number of chromosomes as the original cell
d. changes DNA from cell to cell
2. Typical animal cells contain
a. 46 chromosomes
b. the ability to change their DNA
c. two sets of chromosomes, one set from each parent
d. one set of chromosomes
3. Meiosis produces
a. Egg or sperm cells with one set of chromosomes
b. Egg or sperm cells with two sets of chromosomes
c. Egg or sperm cells identical to the parent cell
d. A cell with the same number of chromosomes as the parent cell.
4. Salmonberry leaf cells contain 14 chromosomes. How many chromosomes will a new leaf cell contain
after mitosis?
Write your answer in the box.
chromosomes.
5. Why are the offspring of flowering plants genetically different from the parent plants?
a. Sexual reproduction produces offspring with new combinations of genes.
b. Sexual reproduction produces offspring with half the number of genes.
c. Asexual reproduction produces offspring with twice as many genes.
d. Asexual reproduction produces offspring with a variety of genes.
6. During the process of fertilization
a. A parent cell is divided into genetically unique offspring
b. Two identical cells are produced
c. An egg and sperm cell combine to restore the number of chromosomes from the original parent
cell
d. Homologous chromosomes exchange genetic information producing unique offspring
7. Independent assortment, crossing over during meiosis, and random fertilization are all process that
contribute to ______________.
a. DNA replication
b. asexual reproduction
c. the production of clones
d. genetic variation among offspring
8. What best describes the reason that siblings often look similar though distinctly different from each
other?
a. both parents have dominant genes
b. they have the exact same DNA
c. similar recombination of genes from the same parent
d. the same egg was fertilized
Do This:
9. The Jack Jumper Ant has only 2 chromosomes; therefore its diploid number is 2. Its sex cells are represented in this
activity. Review the diagram titled “Meiosis and Fertilization”. Place the cell cards in the correct location on the
diagram. Once completed, fill in the flow chart below indicating the correct number of chromosomes that exist in each
cell. Based on how you placed the cell cards, color in with the blue and/or red crayon pencil what the zygote’s genes
would look like in the cell provided below.
Mother ______(# of chromosomes)
Father _____(# of chromosomes)
Meiosis
egg
Meiosis
_____(# of chromosomes)
sperm _____(# of chromosomes)
Fertilization
zygote _____(# of chromosomes)
Mitosis
Embryo _____(# of chromosomes)
Mitosis
Zygote’s Genes
Baby (Jack Jumper Ant) _____(# of chromosomes)
1.
Fill in the Venn diagram below, comparing and contrasting meiosis and mitosis.
Meiosis
Mitosis