Biology

Biology, 28.10.2019 00:43, shainaanderson24

Many virues infect only a certain type of cell because they bind to certain

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Biology, 01.10.2019 01:30, mathamaticlly

At a synapse, adequate stimulation causes the presynaptic cell to release which of the following? action potentials that bind to receptors on the postsynaptic cell neurotransmitter that bind to axons on the postsynaptic cell action potentials that bind to axons on the postsynaptic cell neurotransmitters that bind to receptors on the postsynaptic cell i think this one is d.

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Biology, 14.10.2019 11:30, sophiebeardsley94

Ineed asap in order to infect a cell, a virus must a. inject its protein into the cell while the dna remains attached to the host cell surface b. have a specific protein on its surface that can bind to a specific receptor protein on the host cell c. actively burrow through the cell wall or cell membrane of the host cell to reach the cell's nucleus d. dissolve its own capsid in order to release its nucleic acid how do viruses reproduce? a. by mitosis b. by meiosis c. by infecting living cells d. sexual reproduction

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Biology, 16.10.2019 02:00, kjdog03

What would happen if all of the cells in a developing frog embryo expressed the same type of cadherin on their surfaces? what would happen if all of the cells in a developing frog embryo expressed the same type of cadherin on their surfaces? all the channels between cells would be blocked, so there would be no cell-to-cell communication. antibodies would not be able to bind to cadherin as all the receptors would be blocked. cells would easily dissociate from each other as the wrong cadherins would bind to each other. all of the cells in the embryo would be capable of attaching to one another regardless of the cell type.

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Biology, 08.11.2019 20:31, pandamaknae2003

What is the correct sequence of events for activation of a b cell by a t-dependent antigen? (1) the b cell binds to a cytokine and then interacts with the th cell. (2) this causes the b cell to bind the antigen, and then the b cell is activated. (1) immunoglobulin receptors on the b cell recognize and bind the antigen. (2) an antigen fragment in complex with mhc class 2 is displayed on the b cell's surface. (3) the mhc-antigen complex binds a receptor on a th cell. (4) the th cell secretes cytokines that activate the b cell. (1) identical repeating subunits on the antigen bind to many of the antibodies on the surface of the b cell. (2) this activates the b cell. (1) the t cells bind to an antibody on the b cell. (2) the t cell secretes cytokines. (3) the b cell binds the antigen. (4) the b cell is activated by binding to the antigen.

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