Key Team Publications
... Cell growth and division are tightly coordinated to maintain cell size constant during successive cell cycles. In Schizosaccharomyces pombe, the SAD kinase Cdr2 regulates the cell size at division and the positioning of the division plane. Cdr2 forms nodes on the medial cortex containing factors tha ...
... Cell growth and division are tightly coordinated to maintain cell size constant during successive cell cycles. In Schizosaccharomyces pombe, the SAD kinase Cdr2 regulates the cell size at division and the positioning of the division plane. Cdr2 forms nodes on the medial cortex containing factors tha ...
Four Microscope Mini Labs
... Slides, cover slip, dropper, tweezers, Elodea plants (aka Anacharis) ...
... Slides, cover slip, dropper, tweezers, Elodea plants (aka Anacharis) ...
Study Guide A - Appoquinimink High School
... Fill in the blank with the word or phrase that best completes the sentence. ...
... Fill in the blank with the word or phrase that best completes the sentence. ...
What is homeostasis?
... How do you think Cell Size affects a cell’s ability to maintain homeostasis? Surface area to volume ratio of an object decreases, ...
... How do you think Cell Size affects a cell’s ability to maintain homeostasis? Surface area to volume ratio of an object decreases, ...
Muscle Tissue - Faculty Website Listing
... H- Zone: small area within the A-band where thin filaments terminate from each half of the sarcomere, and only thick filaments are present. I- Band: consists of Z-line and thin filaments from adjacent sarcomeres. Shortens during contraction as a result of sliding filaments. ...
... H- Zone: small area within the A-band where thin filaments terminate from each half of the sarcomere, and only thick filaments are present. I- Band: consists of Z-line and thin filaments from adjacent sarcomeres. Shortens during contraction as a result of sliding filaments. ...
Cell Structure & Transport Review
... According to the Endosymbiotic theory, which organelle probably evolved from aerobic bacteria that were incorporated into early prokaryotic ...
... According to the Endosymbiotic theory, which organelle probably evolved from aerobic bacteria that were incorporated into early prokaryotic ...
The Cell Membrane and Transport - Willimon-PHS
... diffuse through the cell membrane. Still moving from a high concentration to a low concentration… NO ENERGY REQUIRED! ...
... diffuse through the cell membrane. Still moving from a high concentration to a low concentration… NO ENERGY REQUIRED! ...
Lec.2
... The prokaryotic and eukaryotic cell membranes are chemically similar, but eukaryotic membranes contain sterols, whereas prokaryotes generally do not. The only prokaryotes that have sterols in their membrane are members of the genus Mycoplasma. ...
... The prokaryotic and eukaryotic cell membranes are chemically similar, but eukaryotic membranes contain sterols, whereas prokaryotes generally do not. The only prokaryotes that have sterols in their membrane are members of the genus Mycoplasma. ...
1 - Biology D118
... the movement of molecules from and area of greater concentration to an area of lesser concentration. Concentration is the amount of a substance in a given area. Carbon dioxide is constantly made by the cells as they use energy (break down ATP into ADP and then recharge ADP into ATP). Therefore the ...
... the movement of molecules from and area of greater concentration to an area of lesser concentration. Concentration is the amount of a substance in a given area. Carbon dioxide is constantly made by the cells as they use energy (break down ATP into ADP and then recharge ADP into ATP). Therefore the ...
fluid mosaic model
... FUNCTIONS OF PLASMA MEMBRANE Cellular Attachment Cell membranes have junctions – surfaces which interlock keeps cells together – and surfaces which attach them to the extra cellular matrix. ...
... FUNCTIONS OF PLASMA MEMBRANE Cellular Attachment Cell membranes have junctions – surfaces which interlock keeps cells together – and surfaces which attach them to the extra cellular matrix. ...
Ch 6 ppt-1 - Bartlett High School
... Pellet rich in mitochondria (and chloroplasts if cells are from a Pellet rich in plant) “microsomes” (pieces of plasma membranes and Pellet rich in cells’ internal ribosomes membranes) ...
... Pellet rich in mitochondria (and chloroplasts if cells are from a Pellet rich in plant) “microsomes” (pieces of plasma membranes and Pellet rich in cells’ internal ribosomes membranes) ...
1 - Biology D118
... the movement of molecules from and area of greater concentration to an area of lesser concentration. Concentration is the amount of a substance in a given area. Carbon dioxide is constantly made by the cells as they use energy (break down ATP into ADP and then recharge ADP into ATP). Therefore the ...
... the movement of molecules from and area of greater concentration to an area of lesser concentration. Concentration is the amount of a substance in a given area. Carbon dioxide is constantly made by the cells as they use energy (break down ATP into ADP and then recharge ADP into ATP). Therefore the ...
PROKARYOTIC and EUKARYOTIC CELLS
... Plants gather the sun’s energy with light-absorbing molecules called *_pigments____. Plants’ principal pigment is *____chlorophyll_ which appears green to our eyes because it does not absorb light well in the green region of the spectrum. The chloroplast contains saclike photosynthetic membranes cal ...
... Plants gather the sun’s energy with light-absorbing molecules called *_pigments____. Plants’ principal pigment is *____chlorophyll_ which appears green to our eyes because it does not absorb light well in the green region of the spectrum. The chloroplast contains saclike photosynthetic membranes cal ...
The Cellular Level of Organization • Basic, living, structural and
... – active transport uses ATP to drive substances against their concentration gradients – passive transport moves substances down their concentration gradient with only their kinetic energy – vesicular transport move materials across membranes in small vesicles -- either by exocytosis or endocytosis ...
... – active transport uses ATP to drive substances against their concentration gradients – passive transport moves substances down their concentration gradient with only their kinetic energy – vesicular transport move materials across membranes in small vesicles -- either by exocytosis or endocytosis ...
CHAPTER 3
... • sites of protein synthesis • some are located on the ER • others are found in cytoplasm ...
... • sites of protein synthesis • some are located on the ER • others are found in cytoplasm ...
Shoebox Cell
... Shoebox Cell You will work in groups of two or three. You may choose your own group. This will be an on-going project. There will be several dates in which different pieces of the shoebox are due. You may revise parts of your shoebox throughout, but you may not copy other groups. You may work on thi ...
... Shoebox Cell You will work in groups of two or three. You may choose your own group. This will be an on-going project. There will be several dates in which different pieces of the shoebox are due. You may revise parts of your shoebox throughout, but you may not copy other groups. You may work on thi ...
Membrane structure, I
... receptors, ligands, on the membrane surface, especially near coated pits triggers the formation of a vesicle ...
... receptors, ligands, on the membrane surface, especially near coated pits triggers the formation of a vesicle ...
the fundamental unit of life
... organic molecules such as proteins, fats, carbohydrates, nucleic acids etc. it is commonly called the ‘physical basis of life’. c. Cytoplasm: is the viscous, translucent, homogeneous, semi fluid mass of the protoplasm excluding the nucleus and vacuoles. It contains all the vital nutrients such as ca ...
... organic molecules such as proteins, fats, carbohydrates, nucleic acids etc. it is commonly called the ‘physical basis of life’. c. Cytoplasm: is the viscous, translucent, homogeneous, semi fluid mass of the protoplasm excluding the nucleus and vacuoles. It contains all the vital nutrients such as ca ...
Passive and Active Transport.notebook
... diffuse (pass) along the concentration gradient through the semipermeable membrane either through the phospholipid bilayer or through open protein channels. Passive_Transport.asf http://www.brainpop.com/science/cellularlifeandgenetics/passivetransport/ ...
... diffuse (pass) along the concentration gradient through the semipermeable membrane either through the phospholipid bilayer or through open protein channels. Passive_Transport.asf http://www.brainpop.com/science/cellularlifeandgenetics/passivetransport/ ...
Section 3.4 Introduction in Canvas
... Cells are continuously exchanging materials with their environment across the cell membrane. Passive transport is the movement of molecules across a cell membrane that does not require energy input by the cell. Diffusion, a type of passive transport, is the movement of molecules from an area of high ...
... Cells are continuously exchanging materials with their environment across the cell membrane. Passive transport is the movement of molecules across a cell membrane that does not require energy input by the cell. Diffusion, a type of passive transport, is the movement of molecules from an area of high ...
Cell Transport Notes
... Concept Check Explain what would happen if you placed a cell in a: A) Hypotonic Solution B) Hypertonic Solution C) Isotonic Solution What type of solution do you think your cells are surrounded by? ...
... Concept Check Explain what would happen if you placed a cell in a: A) Hypotonic Solution B) Hypertonic Solution C) Isotonic Solution What type of solution do you think your cells are surrounded by? ...
Cytoplasmic streaming
Cytoplasmic streaming, also called protoplasmic streaming and cyclosis, is the directed flow of cytosol (the liquid component of the cytoplasm) and organelles around large fungal and plant cells through the mediation of actin. This movement aids in the delivery of organelles, nutrients, metabolites, genetic information, and other materials to all parts of the cell. Cytoplasmic streaming occurs along actin filaments in the cytoskeleton of the cell.Cytoplasmic streaming was first discovered in the 1830s. The scientific breakthrough assisted scientists in developing an understanding of the different roles of cells and how they function as the basic operating systems of life.This process occurs through the operation of motor proteins called myosins.These proteins use energy of adenosine triphosphate (ATP) to act as a molecular motor, which slides along actin filaments. This works in a manner that tows the organelles and other cytoplasmic contents in the same direction. Myosin proteins consist of two conjoined proteins. If one protein remains attached to the substrate, the substance acted upon by the protein, such as a microfilament, has the ability to move organelles through the cytoplasm.The green alga genus Chara and other genera in the Division Charophyta, such as Coleochaete, are thought to be the closest relatives of land plants. These haploid organisms contain some of the largest plant cells on earth, a single cell of which can reach up to 10 cm in length. The large size of these cells demands an efficient means to distribute resources, which is enabled via cytoplasmic streaming.Cytoplasmic streaming is strongly dependent upon intracellular pH and temperature. It has been observed that the effect of temperature on cytoplasmic streaming created linear variance and dependence at different high temperatures in comparison to low temperatures. This process is complicated, with temperature alterations in the system increasing its efficiency, with other factors such as the transport of ions across the membrane being simultaneously affected. This is due to cells homeostasis depending upon active transport which may be affected at some critical temperatures.In plant cells, chloroplasts may be moved around with the stream, possibly to a position of optimum light absorption for photosynthesis. The rate of motion is usually affected by light exposure, temperature, and pH levels.In reference to pH, because actin and myosin are both proteins, strong dependence on pH is expected. The optimal pH at which cytoplasmic streaming is highest, is achieved at neutral pH and decreases at both low and high pH.The flow of cytoplasm may be stopped by:Adding Lugol's iodine solutionAdding Cytochalasin D (dissolved in dimethyl sulfoxide)↑ ↑ ↑ ↑ ↑ ↑