A student prepares a cell homogenate from spinach leaves. She performs a cell fractionation experiment to determine the shortest amount time of centrifugation at 2000xg that will yield the highest percentage of chloroplasts in the pellet fraction. She splits the spinach homogenate into 5 equal parts and centrifuges the parts at 2000xg for 0, 5, 10, 15 or 20 min. She then determines the proportion of chloroplasts in the supernatant and pellet fractions. The controlled variable(s) in the student's experiment is/are: CHECK ALL CORRECT CHOICES. use of same plant homogenate throughout oroportion of chloroplasts in cach fraction hoe of centrfucation in minutes
A student prepares a cell homogenate from spinach leaves. She performs a cell fractionation experiment to determine the shortest amount time of centrifugation at 2000xg that will yield the highest percentage of chloroplasts in the pellet fraction. She splits the spinach homogenate into 5 equal parts and centrifuges the parts at 2000xg for 0, 5, 10, 15 or 20 min. She then determines the proportion of chloroplasts in the supernatant and pellet fractions. The controlled variable(s) in the student's experiment is/are: CHECK ALL CORRECT CHOICES. use of same plant homogenate throughout oroportion of chloroplasts in cach fraction hoe of centrfucation in minutes
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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Transcribed Image Text:A student prepares a cell homogenate from spinach leaves. She performs
a cell fractionation experiment to determine the shortest amount time of
centrifugation at 2000xg that will yield the highest percentage of
chloroplasts in the pellet fraction. She splits the spinach homogenate into
5 equal parts and centrifuges the parts at 2000xg for 0, 5, 10, 15 or 20
min. She then determines the proportion of chloroplasts in the
supernatant and pellet fractions.
The controlled variable(s) in the student's experiment is/are:
CHECK ALL CORRECT CHOICES.
use of same plant homogenate throughout
proportion of chloroplasts in cach fraction
hoe of centriugation in minutes
Transcribed Image Text:use of same plant homogenate throughout
proportion of chloroplasts in each fraction
time of centrifugation in minutes
g force of centrifugation
hp
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