Awuah29

Christian predent
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Oct 13, 2003
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dude you got to be kidding us. Is that something for a class you taking ?

1) What limits the resolving power of a light microscope?
A) the type of lens used to magnify the object under study
B) the shortest wavelength of light used to illuminate the specimen
C) the type of lens that focuses a beam of electrons through the specimen
D) the type of heavy metal or dye that is used to stain the specimen
E) the ratio of an object's image to its real size
Answer: B
Topic: Concept 6.1
Skill: Knowledge

2) When biologists wish to study the internal ultrastructure of cells, they most likely would use
A) a light microscope.
B) a scanning electron microscope.
C) a transmission electronic microscope.
D) A and C only
E) A, B, and C
Answer: C
Topic: Concept 6.1
Skill: Knowledge

3) The advantage of light microscopy over electron microscopy is that
A) light microscopy provides for higher magnification than electron microscopy.
B) light microscopy provides for higher resolving power than electron microscopy.
C) light microscopy allows one to view dynamic processes in living cells.
D) both A and B
E) both B and C
Answer: C
Topic: Concept 6.1
Skill: Knowledge

4) A primary objective of cell fractionation is to
A) view the structure of cell membranes.
B) identify the enzymes outside the organelles.
C) determine the size of various organelles.
D) separate the major organelles so their particular functions can be determined.
E) crack the cell wall so the cytoplasmic contents can be released.
Answer: D
Topic: Concept 6.1
Skill: Knowledge



5) In the fractionation of homogenized cells using centrifugation, the primary factor that determines whether a specific cellular component ends up in the supernatant or the pellet is
A) the relative solubility of the component.
B) the size and weight of the component.
C) the percentage of carbohydrates in the component.
D) the number of enzymes in the fraction.
E) the presence or absence of lipids in the component.
Answer: B
Topic: Concept 6.1
Skill: Knowledge

6) Which of the following correctly lists the order in which cellular components will be found in the pellet when homogenized cells are treated with increasingly rapid spins in a centrifuge?
A) ribosomes, nucleus, mitochondria
B) chloroplasts, ribosomes, vacuoles
C) nucleus, ribosomes, chloroplasts
D) vacuoles, ribosomes, nucleus
E) nucleus, mitochondria, ribosomes
Answer: E
Topic: Concept 6.1
Skill: Comprehension

7) Quantum dots are small (15-30 nm diameter), bright particles visible using light microscopy. If the dots can be specifically bound to individual proteins on a plasma membrane of a cell, which of the following correctly describes the advantage of using quantum dots in examining proteins?
A) The dots permit the position of the proteins to be determined more precisely.
B) The dots permit the average distance between the proteins to be determined more precisely.
C) The dots permit the size of the proteins to be determined more precisely.
D) The dots permit the motion of the proteins to be determined more precisely.
E) All of the above are correct.
Answer: D
Topic: Concept 6.1
Skill: Application



anyone know??? please hlep..thanks.. i only have 15 days so i don' twant to waste my time... sorry for being such an ass.
 

Enso

Dr. Troy
10+ Year Member
May 24, 2008
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Miami Beach, FL
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Just know those and you should lock a 27+ at least.
 
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flawsin

10+ Year Member
Nov 21, 2008
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if i had to say, i wouldnt waste my time knowing too much about microscope techniques for a test like the DAT. but then again, anything goes with the bio section.
 

lopkiu

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Jul 16, 2007
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to be seriously they CAN ask those questions, but I never see it on both of my DAT and all the practice exams that I took so far. I didn't even bother to memorize it, chances of it appearing will be very low. If you that unlucky and get one of those, then good luck.
 

Chesnok

Waiting game has ended
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Jul 1, 2008
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Sounds like cell bio lab or advanced microscopy techniques class. Bio is random but I think not to this extent. IMO thou :)
 

pcakes

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Jun 10, 2007
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i didnt get any of those on my test. if they did ask those though, i would guess it'd only be one question about it. they only have 40 questions to test your knowledge for biology, doubt they'll waste it on that. i wouldn't worry too much about that :) good luck!
 

Contach

10+ Year Member
Jun 6, 2008
1,488
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NYC
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we got some microscopy imaging questions and cell junction questions on the Canadian DAT. really hard stuff..
I remember studying microscopy for the American DAT...
 

luvchocolate77

10+ Year Member
Dec 13, 2008
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hey Sublimation, I was wondering where you got ur link with the references from?

nevermind- i just noticed it's from the ada website.
 
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