BIOL 1000 Lecture Notes - Lecture 1: Plasmolysis, Optical Microscope, Pipette

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12 Mar 2019

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Determining the minimum concentration threshold required for plasmolysis to occur in the. Aquatic plant rotala nanjenshan using a compound microscope. The experiment was conducted in a laboratory classroom (23 c) in which a compound microscope was used and set up using the k hler illumination technique (nivillac et al. , 52-53) to view the aquatic plant, rotala nanjenshan. After setting up the compound microscope that was located on the lab bench, a few specimens were collected by tweezers from the container of water they were immersed in and placed on a clean glass watch. Some water from the container was kept on the plant once it was transferred to the glass watch so they would not eventually decease. Using the scissors, the leaves were cut about 1 cm long and two pieces of leaves were placed on a glass slide approximately 2 cm apart.

Related Questions

26. Which of the following is the best microscope to use to visualize a cross section of skin
stained so that the cells are purple and the extracellular matrix is pink:
a. Light microscope
b. Confocal microscope
c. Transmission electron microscope
d. Scanning electron microscope
e. Fluorescence microscope
27. Which of the following is the best microscope to use in order to visualize cell to cell
junctions at high magnification:
a. Light microscope
b. Confocal microscope
c. Transmission electron microscope
d. Scanning electron microscope
e. Fluorescence microscope
28. A student is studying the tensile strength of a new metallic alloy. He wants to visualize
the fracture surfaces following tensile testing. Which is the best microscope for this
application:
a. Light microscope
b. Confocal microscope
c. Transmission electron microscope
d. Scanning electron microscope
e. Fluorescence microscope
29. A graduate student is studying the degradation properties of a new polymer that she
developed. She adds a fluorescent molecule to the polymer backbone and makes a thin
layer of the polymer on a glass slide. In order to visualize the polymer and measure its
degradation/disappearance over time, which is the best microscope to use:
a. Light microscope
b. Confocal microscope
c. Transmission electron microscope
d. Scanning electron microscope
e. Fluorescence microscope
30. Endothelial cells were exposed to experimental conditions and are imaged intact under a
microscope following antibody labeling of NF-ÎºB, a protein located inside endothelial
cells. Select the following statement that best describes the approach that should be
used to image the endothelial cells in this experiment.
a. Cells are imaged under a transmission electron microscope.
b. Cells are imaged using phase-contrast in the light microscope.
c. Cells are imaged under a fluorescence microscope.
d. Cells are imaged under a scanning electron microscope.

The option to feel out every sentense are: cell wall, increasing, chloroplasts, hypotonic, hypertonic, cytokinesis, plasmolysis, and decreasing

In an isotonic solution in animal cells, there is no net movement of water.

An animal cell in a ____________ solution may lyse or burst open.

An animal cell in a ____________ solution will shrivel up or crenate.

Plant cells react differently to osmotic changes due to the presence of the ____________ , a structure that animal cells lack.

For a plant cell in a ____________ solution, vacuoles fill with water, ____________ turgor pressure.

For a plant cell in a ____________ solution, the cytoplasm shrinks causing ____________ and ____________ turgor pressure.

------------------

The opcions to fell our the following sentenses are: mitochondria, chloroplasts, ATP, passive, against, carrier, small, receptor, large, with, and active

In contrast to ____________ transport, ____________ transport requires energy for molecules to pass through cell membranes.

This might occur when molecules need to move ____________ a concentration gradient, as is the case of thyroid cells where iodine collects in ____________ concentrations.

This type of transport requires both chemical energy in the form of ____________ and ____________ proteins.

Cells involved in this type of transport often have high numbers of ____________ in order to facilitate this process.

1,Match the descriptions to the type of transport.

- A. B. C.	Water enters a cell because it is hypertonic compared to the extracellular environment, increasing its turgor pressure
- A. B. C.	Water enters guard cells because the guard cells are hypertonic compared to the surrounding cells
- A. B. C.	Potassium ions are pumped into guard cells
- A. B. C.	The motor cells of a Venus fly trap are hypotonic compared to surrounding cells, causing water to leave the motor cells
- A. B. C.	Sugar is loaded into the phloem

A.	Both active and passive transport
B.	Passive Transport
C.	Active transport

2,Describe what is wrong with the following statement and explain why:

All prokaryotic and eukaryotic cells contain plasma membrane, nucleus, ribosomes, organelles, cytoplasm, and cell walls.

What is short-distance transport?

	a,	The movement of solutes from a region of low concentration to a region of high concentration
		b,The movement of water, nutrients, and other substances between cells
c,		The movement of substances from a region of high concentration to a region of low concentration
d,		The movement of water across a semipermeable membrane from a region of low solute concentration to a region of high solute concentration.

What terms describe the movement of water across a semipermeable membrane from a region of high water concentration towards a region of low water concentration (and high solute concentration.)

What is found in the proptoplasm?

Cell wall, cytoplasm, plasma membrane, nucleus, and other cell organelles

Plasmodesmata, cell wall, and plasma membrane

Cell wall, cytoplasm, and plasma membrane

Cytoplasm, nucleus, and other cell organelles

The channels that allow nutrients and protoplasm to pass between plant cells are called _________________.

What happens when a plant cell is placed in a hypotonic solution?

Water will enter the plant cell and the plasma membrane will swell and cell lysis will occur

Water will leave the plant cell and the plasma membrane will pull away from the cell and plasmolysis will occur

Water will enter the plant cell and the plasma membrane will swell and push against the cell wall

Water will leave the plant cell and the plant cell will lose turgor pressure, causing the plant to wilt

________________ transport uses cellular energy.

What molecules make plasma cell membranes hydrophilic on the outside and hydrophobic on the inside?

What type of cells do plants have?

		Bacterial
		Archaeic
		Eukaryotic
		Prokaryotic

BIOL 1000 Lecture Notes - Lecture 1: Plasmolysis, Optical Microscope, Pipette

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