Bio lab test
1 cm = ___ mm
10 mm
20 mm = ______ cm
2 cm
The approximate temperature of the human hand would be ___ oC.
32
Which temperature is closest to normal human body temperature?
37
At what temperature would you expect to see the highest bubble column in the enzyme virtual lab?
37 oC
The coarse focus adjustment knob should only be used with the ___ objective.
4x
Magnification changing knob
A knob, often built into the binocular head, used to change magnification in both eyepieces simultaneously.
Focusing Knob
A large, black or gray knob located on the arm; used for changing the focus of both eyepieces together.
Which of the following is a true statement?
An increasing temperature will increase the reaction rate up to a certain temperature.
The reagent used to test for the presence of sugars is
Benedict's.
The reagent that is used to test for the presence of protein is
Biuret's
Which of the following statements is true?
Enzyme activity rises up to a certain pH value and then decreases.
Which of the following combinations results in a chemical reaction occurring?
H2O2 and catalase
viewing head
Holds the ocular lenses
Binocular head
Holds two eyepiece lenses that move to accommodate for the various distances between different individuals' eyes.
What kind of solution causes crenation to happen to red blood cells.
Hypertonic
What kind of solution causes chloroplasts to be pushed outward against the cell wall.
Hypotonic
does water move into or out of cells that are placed in a hypotonic solution?
In
Diaphragm or diaphragm control lever
Lever that controls the amount of light passing through the condenser
Eyepieces (ocular lenses)
Magnify and project the image to your eye, most commonly a 10X-magnifying lens
Animal cell and plant cell structures
Page 38,39 of lab book
Stage
Platform that holds and supports the slide.
Vascular tissue (Xylem and phloem)
Roots- Vascular cylinder: Transports water and nutrients Stem- Vascular bundle: Transports water and nutrients Leaves- Leaf vein: Transports and water and nutrients.
dermal tissue (epidermis)
Roots- protects inner tissues root hairs absorb water and minerals Stem- Protects inner tissues Leaves- Protects inner tissues Cuticle prevents H2O loss. Stomata carry on gas exchange.
Ground tissue
Roots-Cortex: stores products of photosynthesis, Pith: Stores products of photosynthesis. Stem- Cortex: Carries on photosynthesis, if green, Pith: Stores products of photosynthesis Mesophyll: photosynthesis
Ends with OSE
Sugars
Base
The flat surface of the microscope that rests on the table
How do the coarse and fine focus knobs work on a bright field microscope?
The focus knobs move the stage up and down.
From the Applying the Scientific Method: Pillbug Preference virtual lab simulation, which of the following is true about the results?
The pillbugs tended to move towrd the cornstarch and the control group showed they did not change behavior regarding the sand.
Eyepiece lense
The two lenses located on the binocular head.
Mechanical stage control knob
Two knobs that control forward/reverse movement and right/left movement, respectively.
A drop of pond water may contain
algae
Light source
an attached lamp that directs a beam of light up through the object
If Biuret's reagent was added to a piece of potato, you would expect it to
be blue.
Iodine turns ___ if added to starch.
blue-black
What enzyme is involved in the following chemical reaction? 2 H2O2 ----------> 2 H2O + O2
catalase
You can change the magnification of the image being viewed by
changing the objective lens.
Stage clips
clips that hold the slide in place
In the yeast fermentation virtual lab, the large tube
contained the small tube in a closed environment without oxygen.
If an enzyme is subjected to a pH that is too low or too high with respect to its optimal pH, this will
denature the enzyme.
In the virtual lab, Tonicity in Potato Strips, the ___ was hypotonic to the potato cells causing water to ___ the cells and the potato strip became _____.
distilled water; enter; stiff
Ends with ASE
enzyme
In the yeast fermentation virtual lab, choose the order in which the yeast fermented the contents in order from fastest to slowest.
glucose, fructose, sucrose, starch, water
When starting to focus a slide, you should NOT use the ____ lens first.
high power objective
In the virtual lab Tonicity in Red Blood Cells, the blood solution that appeared clear rather than cloudy was the solution that contained red blood cells placed into a/n ____ solution. You could read the printed words through this test tube because the red blood cells had _____.
hypotonic; burst
Which reagent is used to test for the presence of starch?
iodine
coarse adjustment knob
knob used to bring object into approximate focus; used only with low-power objective
fine adjustment knob
knob used to bring object into final focus
Condenser
lens system below the stage used to focus the beam of light on the object being viewed
Enzymes are
organic catalysts that speed up a reaction.
The correct conclusion from the virtual lab comparing green and blue light during photosynthesis is that
plants exposed to blue light showed a greater rate of photosynthesis compared to those exposed to green light.
if Biuret's reagent was added to an unknown sample and it turned purple, this would indicate the presence of
protein
Accurate measurements are necessary in scientific research for the following reasons EXCEPT so scientists can
quickly share relevant findings.
The field of view is larger and easier to focus when starting to view a specimen using the ____ objective lens.
scanning
Arm
supports upper parts and provides carrying handle
In the Cellular Respiration - Measuring Energy Production in Plants virtual lab, the amount of cellular respiration occurring was determined by
the amount of O2 consumed.
When measuring the volume of a liquid in a graduated cylinder, you should look at the lowest margin of the liquid level. This is called
the meniscus.
The KOH used in the virtual lab, Cellular Respiration - Measuring Energy Production in Plants, the KOH was used
to absorb CO2.
From the virtual lab Diffusion: Effect of Density of Media on the Rate of Diffusion, diffusion occurs faster in ___ than in _____.
water; agar
Cilia and flagella
-Attaches supported by microtubules -Movement fo cell, substances
Nucleolus
-Concentrated area of chromatin -Produces subunits of ribosomes
Cell Wall
-Contains cellulose fibrils -Provides support and protection
Nucleus
-Enclosed by nuclear envelope; contains chromatin (Threads of DNA and protein) -Storage of genetic information; synthesis of DNA and RNA
Vesicle/vacuole
-Membrane-Bound sac -Stores and transports substances
Mitochondrion
-Membranous cristae enclosed by double membrane -Carries out cellular respiration, Carries out producing energy (ATP molecules)
Endoplasmic reticulum (ER)
-Membranous, flatten channels and tubular canals; rough ER and smooth ER -Synthesizes and/or modifies proteins and other substances; transport by vesicle formation.
Centrioles in centrosome
-Microtubule-containing, cylindrically shaped organelle in a structure of complex composition -Centrioles organize microtubules in cilia and flagella; centrosome organizes microtubules in cell
Cytoskeleton
-Microtubules, intermediate filaments, actin filaments -Maintains cell shape and assists movement of cell parts
Plasma Membrane
-Phospholipid bilayer with embedded proteins -outer cell surface that regulates entrance and exit of molecules
Ribosome
-Protein and RNA in two subunits -Coordinates protein synthesis
objective lens
-Scanning objective: Shortest lense, 4x -Low-power objective: Longer than scanning, 10x -High-power objective: longest lens, 40x -Oil immersion objective: Greatest magnification, 100x
Golgi apparatus
-Stack of membranous saccules -Processes, packages, and distributes proteins and lipids
Rough ER
-Studded with ribosomes -Protein synthesis
Lysosome
-Vesicle containing hydrolytic enzymes -Digest macromolecules and cell part
Peroxisome
-Vesicle containing specific enzymes -Breaks down fatty acids and converts resulting hydrogen peroxide to water; various other functions.
Smooth ER
-lacks ribosomes -Synthesis of lipid molecules
Chloroplast
-membranous thylakoids enclosed by double membrane -Carries out photosynthesis, producing sugars
Why does chlorophyll b appear yellow-green?
It reflects light in those wavelengths and absorbs red and violet.
_____ is the ability to distinguish fine detail of a microscope image.
Resolution
Nosepiece
Revolving device that holds objectives
Osmosis
The movement of water across the plasma mebrane
The basic metric unit for length is the
m
illuminator
used to illuminate an object from above; may be built into the microscope or may be separate
