unit 1 quiz study

mitochondria are associated with the production of _________.

ATP

Lab coats, gloves, face masks, and goggles are all examples of

personal protective equipment

in plants, chloroplasts are necessary for

photosynthesis

which function is associated with chloroplasts?

photosynthesis

Match each cellular component with the correct cell type: prokaryotic cell, eukaryotic cell, both: A. Prokaryotic Cell B. Eukaryotic Cell C. Both Cellular Component: has organelles has a nucleus has a nucleoid has a cytoplasm contains ribosomes has a cell membrane

prokaryote: has a nucleoid eukaryote: has a nucleus, has organelles. both: has a cell membrane, contains ribosomes, has cytoplasm.

which of the following must be visually studied using microscopy?

prokaryotes

a researcher samples the waters of the boiling hot springs in yellowstone national park. under the microscope she finds cells in the water. if these are indeed living cells, what type of cell would they most likely be?

prokaryotic, archaea

the purpose of lab safety rules and protocols is to

protect everyone in the lab from injury and infection

ribosomes are the site of

protein synthesis

the image shows a biuret test for protein. is it positive or negative?

purple = positive

in what type of emergency situation would you utilize the equipment seen in this image?

removing a large volume of chemicals spilled on unprotected arms or splashed onto your face or eyes.

the objective lenses of the compound light microscope are attached to the

rotating nosepiece

Slides, scapels, razor blades, cover glasses, and capillary tubes are all classified as

sharps

where should glass slides, pipettes, and capillary tubes be disposed?

sharps container

infectious agents in the laboratory are classified into four ___________ levels based on their ease of transmission and ability to cause disease.

biosafety

which reagent is used to detect the presence of protein?

biuret

match each test with the substance it is intended to detect.

biuret test- protein iodine- starch Benedict's - simple sugars brown paper test- lipids

which color change represents a positive reaction for the presence of sugar using the Benedict's test?

blue to orange

which color change represents a positive reaction for the presence of protein using the biuret test?

blue to purple

which of the following tests is used to detect the presence of lipids?

brown paper test

correctly identify the parts of a plant cell.

1. nucleolus 10. central vacuole 2. nuclear envelope 11. granum 3. nuclear pore 12. chloroplast 4. ribosomes 13. plasma membrane 5. rough er 14. mitochondrion 6. smooth er 7. golgi 8. cytoplasm 9. cell wall

Identify the structures of the prokaryotic cell in the figure below

1. ribosome 4. nucleoid 2. plasma membrane 5. cell wall 3. fimbrae 6. capsule

which objective lens requires oil to be applied?

100x

the magnification of the ocular lens is

10x

how long should hands be lathered while washing?

20 seconds

select the letter that matches the person correctly holding the microscope.

B? (holding it by the arm)

which reagent is used to detect the presence of simple sugars?

Benedict's

which of the following tests requires heating prior to observing results?

Benedict's or iodine?

the biuret test would indicate a positive result for proteins in which of the following solutions?

albumin solution

plasma membranes are a feature of

all cells

a disinfectant is used on your work surface:

all of the answer choices are correct.

the benedict's test indicates a positive result when the solution turns

all of the choices are correct (brown, red, orange, yellow, green)

proteins are polymers composed of

amino acids

the arrow is pointing to the

arm

laboratory instruments are sterilized prior to reuse by ____________.

autoclaving (steam autoclave)

which is the most appropriate disposal for a swab used to culture your throat during lab?

biohazard bag

which of the following would be most appropriate for disposal of cultures on agar plates?

biohazard bag or bin

the specialized structure that stores pigments, water, inorganic ions, and maintains turgor pressure is

central vacuole

the structure that easily distinguishes a plant cell from an animal cell is

chloroplasts

categorize the following as structural/functional characteristics of either the chloroplasts or the mitochondria.

chloroplasts: not found in animal cells, contain chlorophyll, carry out photosynthesis, ultimate source of food for all living things. mitochondria: found in plant and animal cells, carry out cellular respiration, abundant in human muscle cells.

the disinfectant spray in this illustration is most appropriately used for (bleach is pictured)

cleaning up infectious agents

which part of the microscope will be used first to adjust the focus when starting with the lowest power lens?

coarse focus

the arrow is pointing directly pointing at the

coarse focus knob

staining cells such that their color is different from the background enhances their

contrast

If cells were moved to a low-gravity environment, such as in space exploration, a change would most likely be expected in the

cytoskeleton

the lysosome contains __________ enzymes.

digestive

the __________ lenses further magnify the image produced by the objective lens.

ocular

the arrows are pointing to the

ocular lenses

eyeglasses provide the same protection as goggles or safety glasses. T/F?

false

if you sustain a small cut in the lab that can be readily be covered with a band-aid, there is no need to notify the lab instructor. T/F?

false

most chemicals used in the laboratory can be discarded in the sink after use. T/F?

false

using a cell phone in the lab is permissible since it can be used for timing experiments. T/F?

false

match the name of the microscope parts in column A with the descriptions in column B. Place the letter of your choice in the space provided.

field of view- circular area seen through the eyepiece nosepiece- part to which the objective lenses are attached stage (slide) clip- holds a microscope slide in position eyepiece (ocular) - contains a lens at the top of the body tube arm- serves as a handle for carrying the microscope

the fine adjustment knob on the microscope

fine-tunes the focus

when storing the microscope the stage should be left in the _________ position.

fully down

the endoplasmic reticulum

functions in internal transport of macromolecules.

Which cellular structure is responsible for packaging materials with the cell?

golgi apparatus

after focusing on an object with the low power objective lens, you are trying to bring it into focus under the 40x objective lens, but the field of view is very dark. Which of the following may remedy this problem?

increase the light intensity

which reagent is used to detect the presence of starch?

iodine

Eukaryotes such as animal and plants cells differ from prokaryotes in that prokaryotes

lack a true nucleus

Compared with a eukaryotic cell, a prokaryotic cell

lacks organelles beyond ribosomes.

which group of molecules are insoluble in water?

lipids

while testing for an emulsifier, one of the test tubes showed a layer of oil sitting on top of the water. What property of lipids causes this to occur?

lipids are nonpolar and so do not mix with polar water molecules.

a change in what component of microscopy influences the apparent size of the objects being viewed?

magnification

the lenses of a brightfield microscope are responsible for the __________ of the object you are viewing.

magnification

which of the following is defined as the ability make an object appear larger?

magnification

the "powerhouse" of the cell is the

mitochondria

cellular respiration is best associated with the

mitochondrion

emulsifiers are

molecules with a polar end and a nonpolar end that can be used to disperse lipids into polar liquids such as water.

what are the building blocks of carbohydrates?

monosaccharides

in which circumstances is food and/or beverage allowed in the laboratory?

never

Which eukaryotic organelle is the largest?

nucleus

match the names of the microscope parts in column A with the descriptions in column B. Place the letter of your choice in the space provided.

stage - platform that supports a microscope slide adjustment knob- causes stage (or objective lens) to move upward or downward iris diaphram- increases or decreases the light intensity condenser- concentrates light onto the specimen objective lens system- after light passes through the specimen, it enters this lens system

which molecule is hydrolyzed (digested) by amylase?

starch

polysaccharides are polymers composed of

sugars

If a cell lacked ribosomes, it would not be able to

synthesize proteins

the function of the nucleus is

to store genetic information

a drop of liquid that does not evaporate from brown paper after a 20-minute period at room temperature contains lipids. T/F?

true

long hair should always be tied back when in the laboratory. T/F?

true

the cell is the basic structural/functional unit common to all living organisms. T/F?

true

watches, bracelets, and rings should be removed prior to washing hands. T/F?

true

which of the following must be visually studied using electron microscopy?

viruses?

when should the chemical fume hood be used?

when using hazardous chemicals

which color change represents a positive reaction for the reaction for the presence of starch using the iodine test?

yellow to purple