What tactic do we use to separate the pigments present in leaves?
Do senescent (autumnal) leaves contain pigments other than chlorophyll?
In plants, starch is the storage form of ____.
In plants, gases enter & exit leaves through structures called ____.
____ is the process by which new cells receive exact copies of all the chromosomes of the initial cells & there is no change in chromosome #.
Cells w/homologous prs of chromosomes are called (diploid/haploid) cells.
____ is the process that produces gametes.
After replication, chromosomes remain attached at the ____.
A cell w/only 1 member of each homologous pr is called a (diploid/haploid) cell.
When RBCs are placed in a hypotonic solution they ____.
Swell or lyse
When RBCs are placed in a hypertonic solution they ____.
Shrivel or crenate
We used carmine particles in order to view ____ ____.
We use dialysis tubing to separate out particles according to ____.
RBC membranes are ____ permeable.
In elodea, turgor pressure can change w/o damage to the plant cell due to the presence of what structure?
How does a catalyst influence the rate of a chemical reaction?
Speeds it up
Are biological catalysts changed during chemical reactions?
The ____ is the reactant molecule changed by a catalyst.
Biological processes depend on molecular catalysts called ____.
What enzyme breaks down sucrose into glucose & fructose?
The force applied to prevent the osmotic mvmt of H₂O across a membrane fr a hypotonic to a hypertonic solution is called ____ ____.
Random mvmt of particles is called ____ mvmt.
The physical process where molecules move fr an area where they are in high concentration to 1 of lower concentration is called ____.
Organelle membranes & the plasma membrane allow H₂O to pass freely through them, while regulating the mvmt of solutes. These membranes are ____ ____.
The passage of H₂O molecules thru a selectively permeable membrane fr a region of high concentration to a region of low concentration is called ____.
Would the upper layer of clarified butter have a (+) or (-) biuret reaction?
If a food tastes sweet but yields a neg reaction to Benedict's Solution, what might this suggest?
The food may be made up of polysaccharides & Benedict's Solution only detects mono- & disaccharides
Clarified butter lacks the usual butter flavor. What does this suggest about the molecules responsible for the taste of butter?
The moles responsible for the taste are located in the H₂O soluble protein & not in the lipids
In an ____ the lipids occur in very small droplets dispersed throughout the H₂O soluble portion.
If a potato is hydrolyzed would it have a pos or neg reaction to iodine reagent?
Does sucrose give a pos reaction w/Benedict's solution?
I₂Kl (iodine reagent) turns a deep blue in the presence of ____.
Disaccharides are cleaved into monosaccharides by a process of ____.
What method did we utilize to test for the presence of lipids?
When Biuret reagent reacts w/proteins, it changes color from ____ to ____ or ____ ____.
Lavender or light violet
The example of an emulsion we used was ____.
____ is the process by which lipids can be separated from water-soluble, protein containing parts of butter.
What are the building blocks of carbohydrates?
We metabolize food in order to release in the form of ____.
Sugar is sweet. Mindful of this, what would you predict the results of a test using Benedict's solution & an artificial sweetener such as saccharin or "Equal" to be?
The most important pigment in green plants is ____.
What gas is required for photosynthesis?
What gas is produced by photosynthesis?
Photosynthesis absorbs energy in the form of light. What is the source of that light?
Pigments in leaves that absorb solar energy & then pass the energy on to other photosynthetic pigments are called____ ____.
In a catecholase reaction, what reddish brown product was produced?
What light is divided into its component wavelengths using an instrument called a ____.
As this reddish brown product increased during the reaction, did the amt of absorbance measured by the instrument decrease or increase?
Catecholase catalyzes a reaction using the substrate called ____.
Many factors affect the reaction rate of a biochemical reaction. Name a couple.
pH, Temp, Enzymes, salinity
Convert 0.005328 to scientific notation.
5.238 x 10⁻³
Convert 488,471,566 to scientific notation.
4.88 x 10⁸
The dependent variable is always plotted on which axis of the graph?
Convert 2.80mm to μm.
2.8 x 10³μm
Convert 460 ml to L.
The pH scale ranges from . . .
A solution whose pH resists change on addition of sm amts of either acid or base is called a ____ solution.
Acidic substances are (above/below) 7?
Extract of red cabbage is used as an indicator for ___.
A solution w/a pH value of 4 would have a how many times greater concentration of H⁺ than a solution w/a pH of 5?
10 times greater
The best microscope to use in order to view an extremely thick section of a sample is a ____ microscope.
The part of the microscope that holds the slide is the ____.
The nose piece of a compound light microscope holds what lens?
The total magnification of a prepared specimen viewed under a compound light microscope w/an eye magnification x10 & an objective lens magnification x40 is ____.
The ability to distinguish 2 objects that are very close together as separate is a characteristic referred to as what?
The pH of your garden soil is 8.0; the pH of your plant fertilizer is 3.0. How much greater is the concentration of H⁺ in the fertilizer than the garden soil.
In the lab we used buffers to calibrate the pH meter b/f we measured the pH of the solution. If you want to adjust the pH of the solution to 7.3 what buffer should we use 1st in order to calibrate the meter in that range?
Buffer pH of 7
Describe the capacity of a buffer.
With a small amt of either an acid or base added to a buffered solution, there is little or no change in pH
When phenol red was added to an unk solution, the solution turned yellow indicating the pH was ____ than 7.
What was the buffer we used in the lab?
What was the name of the stain we used on the wet mount of cheek scrapings?
Using the stereoscopic (dissecting) microscope, the letter "e" viewed thru the eyepieces appeared to be right-side up or upside down?
When you used the colored slides @ obj lens x4 the image you saw was (field of view or depth of focus).
Field of View
The plant cells we used in the lab were ____.
Viewing the slide of 3 colored threads, as you increase the pwr of the magnification by changing the obj lens of the light microscope, did the depth of focus increase or decrease?
Monomers of proteins are called ____ ___.
What are the 3 classes of macromolecules we studied?
What reagent did we use to test for starch?
We used biuret reagent to test for the presence of ____.