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BIOL 1208 : Quiz4

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azuremammoth471
15 Mar 2019
School
LSU
Department
Biological Sciences
Course
BIOL 1208
Professor
All

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Document Summary

Quiz 4: cell a is placed in solution x and the cell shrinks in size. Which cell is higher in terms of solute concentration: suppose you have 3 molecules, a, b, c. their molecular weights are a: The lipid solubility of all the 3 molecules is similar. Predict the order of speed at which the molecules will cause hemolysis of blood cell. Put 1, 2, and 3 in front of the molecules below to show order, 1 being the fastest and 3 for the slowest. Fill in the blank: name two of the factors affecting the ability of a molecule to cross a biological membrane. ________________ & _______________: a solution with an equal amount of solute as the cells within is termed. True or false: when comparing the sets of data, if their standard deviations overlap significantly, then it can be inferred that the data sets are statistically the same.

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Related Questions

1. Which of the following best describes a condition where a membrane separates two solutions that are NOT in equilibrium?

A a rainbow
B equilibrium
C a homogeneous solution
D neighboring solutions that have unequal concentrations of molecules

2. In this lab, we will use dialysis tubing to....

A simulate biological membranes
B separate blood from urine
C turn starch blue
D turn starch brown

3. Biological membranes have different types of pores and channels, and different permeability to small molecules depending on size and charge. In this lab, you can assume that the dialysis tubing we are using are permeable to....

A starch
B water and potassium iodide
C complex sugars
D small animals

4. Kinetic energy is a property of the atom, and also of more complex structures such as molecules. You can actually see kinetic energy of non-living things in action under the microscope. When we visualize this, we call what we see...

A diffusion
B Brownian motion
C osmosis
D all of the above

5. One word to describe the effect of water diffusion across a membrane, which alters the water pressure on one side of the membrane with respect to the other is....

A osmosis
B lysis
C aquaporin
D equilibrium

6. Suppose that you place a red blood cell in a hypertonic solution containing penetrating molecules. In this environment, you would expect the cell to eventually

A swell and burst
B shrink
C remain the same in size
D photosynthesize

7. For the "egg lab", what is the main objective?

A to determine which egg has more mass
B to determine which egg is hypertonic to the other
C to determine which solution the egg is placed in is hyper- or hypo-tonic solution
D to determine which egg is isotonic with the egg

8. The main difference between a 'prediction' and a 'hypothesis', is that predictions....

A are framed as an "if...then...because" statement
B are framed as a general statement
C are framed as an "always....true" statement
D are framed as an "correct....incorrect" statement

9. Read each of the following procedural steps for plasmolyzing Elodea sprig and then select the correct order below.

Locate a region of healthy cells and sketch a few adjacent cells

Sketch the plasmolyzed cell

While touching one corner of the coverslip with a piece of Kimwipe to draw off the
water, add a drop of concentrated salt solution to the opposite corner

Obtain a leaf from an Elodea or Water sprite plant

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

Cell Membranes Lab Report

  1. Diffusion

  1. Compare the following terms: solvent, solute, andsolution.

  1. Go to Lab, Section I, Exercise 1 to explore the factorsinfluencing the rate of diffusion and complete the following:

  1. Predict how molecular mass and temperature may affect theoutcome of this experiment.

  1. Record the data from information in the Lab in the tablebelow.

Time

(min)

Diameter (mm)

5°C MB

5°C PP

23°CMB

23°C PP

0

15

30

45
  1. Construct a line graph of the data from the table above. Yourgraph should include labeled axes, units, and a legend indicatingwhich treatment is presented. Sign, date and prepare an image ofyour graph and include it with this lab report.
  1. Osmosis

  1. Go to Lab, Section II, Exercise 2 to view a demonstration ofosmosis and answer the following questions:

  1. Describe the net movement of water in osmometer 1.
  1. How is the movement of water molecules related to theconcentration gradient of the solution?

  1. Go to Lab, Section II, Exercise 3 to observe the effect ofsolute concentration on the rate of osmosis. Answer the followingquestions:

  1. Was the net movement of water in bags 1 to 4 into or out of thebags?
  1. Explain the results from bags 4 and 5.
  1. Selective Permeability of Membranes

  1. Go to Lab, Section III, Exercise 4 to learn about theimportance of selectively permeable membranes, then complete thetable and answer the following questions:

Contents of Beaker

0 Min

30 Min

Starch

Chloride ion
  1. Which substances diffused through the dialysis membrane?

  1. How does dialysis tubing model the selective permeability of aplasma membrane?
  1. Tonicity

  1. Go to Lab, Section IV, Exercise 5 and 6 to observe plasmolysisin Elodea cells and tonicity in red blood cells. Summarizethe concept of tonicity using blood and Elodea cells asexamples. Your description should incorporate these terms: turgid,plasmolysis, hemolysis, and crenation.

Cells

Isotonic Solution

Hypertonic Solution

Hypotonic Solution

Elodea

RBC

  1. Based on your previous work, reproduce the table below and drawan illustration of a single cell in each box. Include arrows toshow the direction of water flow relative to each cell and dots tosymbolize solutes. Sign, date and prepare an image of your drawingand include it with this lab report.

Cells

Isotonic Solution

Hypertonic Solution

Hypotonic Solution

Elodea

RBC

Summary Questions

  1. Compare diffusion and osmosis. Give an example of each.

2. In which direction will osmosisoccur if a 15% sugar solution is separated from a 25% sugarsolution by a selectively permeable membrane?

3. Why did osmosis, but not diffusionof sucrose molecules, occur across the dialysis membrane containing20% sucrose solution?

4. You are having a party and thecelery is limp. What might you do to make the celery crisp (turgid)again? What will occur in the cells?

5. A small amount of fertilizer(mineral salts) will stimulate plant growth, but over fertilizationcan kill plants? Why?

6. Michael adds sugar to his coffee.Explain what in this drink is the solvent, solute, and solution.

7. You add a cube of sugar to yourdrink. How could you speed up the diffusion of sugar moleculeswithout stirring?

8. How is dynamic equilibriumestablished within a solution?

It's a quiz for my life science class.

QUESTION 1

Organisms that have descended from the same initial group and have the ability to interbreed belong to the same

A.

species.
B.

family.
C.

class.
D.

genus.
E.

order.

5 points

QUESTION 2

The simplest entity that exhibits all of the properties of life is called a(n)

A.

molecule.
B.

cell.
C.

organism.
D.

tissue.

5 points

QUESTION 3

In populations, adaptation usually arises through

A.

responsiveness.
B.

heredity.
C.

metabolism.
D.

natural selection.
E.

development.

5 points

QUESTION 4

Scientists have found that ancient fossils

A.

are less similar to present-day organisms than more recent fossils.
B.

are just as similar to present-day organisms as more recent fossils.
C.

are more similar to present-day organisms than more recent fossils.
D.

are very similar to present-day organisms.
E.

bear no resemblance to present-day organisms.

5 points

QUESTION 5

What is the term that describes the study of the relationship between living things and components of their environment?

A.

herpetology
B.

analogy
C.

zoology
D.

ecology
E.

ichnology

5 points

QUESTION 6

Characteristics usually associated with life include all of the following except:

A.

motility.
B.

a high degree of organization.
C.

lack of change from generation to generation.
D.

reproduction.
E.

responsiveness to stimuli.

5 points

QUESTION 7

The scientific name for the black-footed ferret is Mustela nigripes. The name Mustela indicates the _____________________ to which the organisms belongs.

A.

phylum
B.

class
C.

family
D.

species
E.

genus

5 points

QUESTION 8

Which of the following is considered to be the most basic living unit?

A.

organ system
B.

molecule
C.

organelle
D.

cell
E.

tissue

5 points

QUESTION 9

Which of the following concepts best describes the wide variety of dog species we observe, ranging from the domesticated golden retriever or the basset hound, to the wild dogs of Africa, to foxes?

A.

preadaptation
B.

special creation
C.

inheritance of acquired characteristics.
D.

taxonomy
E.

evolution

5 points

QUESTION 10

If an ecologist is studying the cycling of carbon through a particular environment (which involes the movement of carbon through living things as well as through rock, air, and water), the scientist is studying at what level of ecology?

A.

organismal
B.

community
C.

ecosystem
D.

population
E.

biosphere

5 points

QUESTION 11

Which list is organized from smallest to largest level of organization of life?

A.

organisms, organ systems, organs, tissues, cells, organelles
B.

organelles, cells, tissues, organs, organ systems, organisms
C.

organelles, tissues, cells, organ systems, organs, organisms
D.

tissues, cells, organelles, organs, organ systems, organisms
E.

cells, tissues, organ systems, organelles, organs, organisms

5 points

QUESTION 12

When examining the hierarchy of life, which of the following terms is most inclusive?

A.

biosphere
B.

population
C.

species
D.

ecosystem

5 points

QUESTION 13

The units of inheritance are

A.

evolutions.
B.

heredities.
C.

genes
D.

twins.
E.

metabolic activities.

5 points

QUESTION 14

Organisms that undergo asexual reproduction

A.

require another organism to reproduce.
B.

are usually very complex.
C.

produce offspring that are different from each other.
D.

do not require energy to reproduce.
E.

produce offspring that are identical to each other and to the parent.

5 points

QUESTION 15

All the living organisms in a particular area at a particular time make up a

A.

biosphere.
B.

community.
C.

biosystem.
D.

population.
E.

ecosystem.

5 points

QUESTION 16

The first step in the scientific method is to

A.

identify a problem.
B.

predict the results of an experiment.
C.

propose a solution.
D.

draw a conclusion.
E.

perform an experiment.

5 points

QUESTION 17

Young multicelled organisms usually start out small, then grow in size, and increase in complexity. This process is called:

A.

heredity.
B.

metabolism.
C.

development.
D.

evolution.
E.

heredity.

5 points

QUESTION 18

To maintain order within their cells and organs, all living things must

A.

carry on metabolism.
B.

reproduce.
C.

constantly change.
D.

be able to move.
E.

extract energy from sunlight.

5 points

QUESTION 19

Which of the following includes Highest levels of hierarchy?

A.

family
B.

phylum
C.

domain
D.

kingdom
E.

order

5 points

QUESTION 20

Fungi are classified into which domain?

A.

Archaea
B.

Eukarya
C.

Bacteria
D.

Fungi