Biology

Biology, 02.07.2019 05:30, Chloeangelxoxo

The smallest functional found within a cell are called

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Chemistry, 08.07.2019 10:30, kiramartin3

Which statement best describes a cell? a. a compartment that contains dna and regulates when genes are turned on and off. b. the smallest structural and functional unit of organism can can be said to be alive. c. a sac-like membrane that stores water. d. a small compartment that includes a cytoplasm nucleus and a cell membrane

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Biology, 11.07.2019 11:30, grace9874

Me with my biology hw- 1.) the basic unit from which cell membranes are constructed is a- cell walls b-free moving proteins c- phospholipid layer 2.) four glucose molecules are found in a cell and ten are found outside the cell. at equilibrium, how many glucose molecules would be found in a cell, assuming the glucose molecules can cross the cell membrane? a- 4 b- 7 c- 10 3.) the movement of water in or out of a cell is called: a- diffusion b- osmosis c- facilitated diffusion 4.) if a red blood cell is placed in pure, fresh water, the cell will: a- stay the same b- burst c- become darker 5.) which of the following would occur if a cell with 1% dissolved salt solutes is placed in a 10% salt solution? a- the cell would swell b- water would leave the cell c- the cell would burst

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Biology, 26.07.2019 15:00, trekey36

Cells that are infected, damaged, or have reached the end of their functional life span often undergo "programmed cell death." this controlled cell suicide is called apoptosis. select the appropriate description of this event on a cell's life cycle. cells that are infected, damaged, or have reached the end of their functional life span often undergo "programmed cell death." this controlled cell suicide is called apoptosis. select the appropriate description of this event on a cell's life cycle. each cell organelle has protein signals that initiate the breakdown of the organelle's components which leads to cell death. during apoptosis, dying cells leak out their contents including digestive enzymes that also destroy healthy cells. apoptosis is regulated by cell surface receptors that signal when a cell has reached its density-dependent limits. during apoptosis, cellular agents chop up the dna

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Biology, 01.08.2019 09:30, starfox5454

Write out the full name for dna. what is a gene? where in the cell are chromosomes located? dna can be found in what two organelles? what two scientists established the structure of dna? what is the shape of dna? what are the sides of the dna ladder made of? what are the "rungs" of the dna ladder made of? what sugar is found in dna? in rna? how do the bases bond together? the two purines in dna are dna is made of repeating units called why is rna necessary to act as a messenger? why can't the code be taken directly from the dna? proteins are made where in the cell? how do some cells become brain cells and others become skin cells, when the dna in all the cells is exactly the same. in other words, if the instructions are exactly the same, how does one cell become a brain cell and another a skin cell? why is dna called the "blueprint of life"?

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