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chanchan27104
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A multiple of CH2O is the basic molecular formula for what kind of macromolecule?
Carbohydrate
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What is this?
- Lipid
- Glycerol and 3 fatty acids
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The embedded molecules seen here can act as a buffer against either too much heat or cold in animal cells. What are they?
Cholesterol
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What has a certain hydrophilic composition that certain molecules or ions can use as a tunnel through the membrane?
Channel Protein
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Phagocytosis and pinocytosis are examples of
- Endocytosis
- Bulk Transport
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A cell that has a solute concentration of 0.5% is placed in a solution that has a solute concentration of 0.025%. What can we say about this cell?
- The cell is hypertonic with respect to the solution
- Water is likely to enter the cell, making it swell
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In cell signaling, receptor activation occurs in the cytosol only for intracellular receptors whose ligand has to cross the plasma membrane. True or false?
True
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What attaches to both the cytoskeleton and the extracellular matrix?
Integrin
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What organelles are packets of RNA and protein made up of large and small subunits and are the sites of protein synthesis?
Ribosomes
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When a cell secretes a signaling compound that can affect it as well as neighboring cells, we call this mode of communication...
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The structure is a schematic of an enzyme. The blue pointer is indicating the
- Active Site
- Site for competitive inhibition to occur
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A reaction which builds from simple to complex may be
- Anabolic
- Endergonic
- Photosynthesis
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During redox reactions, the molecule that donates an electron is said to be ___, while the molecule accepting the electrons is said to be ___. The one donating the electrons is also known as the ___ agent, and the one accepting is known as the ___ agent.
Oxidized, reduced; reducing, oxidizing
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What can alter the function of enzymes?
- pH
- Temperature
- Cofactors
- Inhibitors
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Enzymes lower the activation energy of a reaction, and so speed up the reaction. True or false?
True
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In an electrogenic pump, ATP is used to pump __ against its concentration gradient to the outside of the cell; in turn this builds potential energy known as the "proton motive force" that is used to transport another molecule ___ its concentration gradient
H+; against
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At rest, the cell is relatively more ___ inside and relatively more ___ outside, and the Na+ concentration is higher ___ while the K+ concentration is higher ___.
negative, positive; outside, inside
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In long distance signaling, the molecule used is termed
Hormone
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When a ligand binds to a specific protein, we call this
Receptor-Activation
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When microfilaments and microfibers assemble and reassemble themselves, we can call this type of cellular work
Mechanical
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Most ATP is made by
Chemiosmosis
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Spindle fibers attaching to chromosomes to pull them apart during cell division is considered
Mechanical Work
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Glycolysis occurs in which part of the cell?
Cytosol
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