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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Concept explainers
Proteins
We generally tend to think of proteins only from a dietary lens, as a component of what we eat. However, they are among the most important and abundant organic macromolecules in the human body, with diverse structures and functions. Every cell contains thousands and thousands of proteins, each with specific functions. Some help in the formation of cellular membrane or walls, some help the cell to move, others act as messages or signals and flow seamlessly from one cell to another, carrying information.
Protein Expression
The method by which living organisms synthesize proteins and further modify and regulate them is called protein expression. Protein expression plays a significant role in several types of research and is highly utilized in molecular biology, biochemistry, and protein research laboratories.
Question
Section E. Estimation of the Water Potential (Ψw) of Storage Tissue by Volume Change Method
pls answer tysm!
Transcribed Image Text:Then
9.
Determine the molar concentration of sucrose
that gives 0% change in weight. Obtain the Ys using
the previous formula.
10. Then compute the water potential using the fomula:
Yw = Ys + Yp
Your answer will be in units of J m (energy per unit
volume) which are equivalent to pascal (Pa). Convert
to MPa by dividing to 10°.
What is the sucrose concentration at which zero percent
change in weight is observed?
What is the water potential Yw of Tradescantia or Allium
сера сells?
What is the water potential Yw of the Solanum tuberosum
potato cells?
Transcribed Image Text:A similar experiment is as follows:
1.
Obtain 11 (50-ml capacity) beakers and mark
from 1-11.
In each beaker add 20 ml of one concentration of
the following sucrose solutions: Distilled water, 0.1.,
0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1.0 M
3.
2.
Using a cork borer, cut 55 cylinders from a large
potato or any storage tissue and trim each cylinder to
0.5 cm in length.
Place the cylinders in a covered beaker as you
cut them to prevent them from drying up.
Divide the cylinders in sets of 5. Weigh each set
(to 0.01 g). Put one set of cylinders in each of the
beakers.
4.
5.
Record the fresh weights of each set in
Table 6.
After 90 minutes, remove the cylinders, gently
blot dry with paper towels and reweigh.
7.
6.
Subtract the initial weights from the final weights.
Divide the difference by the initial weight and multiply
by 100 to get the % weight change. Complete Table 6.
8.
Plot the% change in weight (y, ordinate) vs.
sucrose concentration (x, abscissa) on a graph. Draw
the best fit straight line through the points.
Table 6a.
Sucrose
Concentration
0 0.1 0.2 0.3 0.4 0.5 0.6 | 0.7 0.8 0.9 1.0
(Molarity)
3.00 3.00 3.00 3.00 3.00 3.00 3.00 3.00 3.00 3.00 3.0
Initial Weight (g)
3.61 3.38 3.103.02 2.93 2.70 2.50 1.90 1.80 1.63 1.38
Final Weight (g)
A Weight (g)
% Weight Change
Table 6b.
Sucrose
Concentration
0 0.1 0.2 0.3 0.4 0.5 0.6
0.8 0.9 1.0
(Molarity)
5.00 5.00 5.005.00 5.00 5.00 5.00 5.00 5.00 5.00 5.0
Initial Weight (g)
6.41 6.38 5.80 5.054.50 4.00 3.50 2.90 2.20 1.75 1.38
Final Weight (g)
A Weight (g)
% Weight
Change
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