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Keith_Richards [23]
3 years ago
6

Define and give an example for each term:

Biology
1 answer:
Lostsunrise [7]3 years ago
5 0
Predator . lion. Tigger example
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How would the role of gene expression in cells be best described?
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Gene expression is a strictly controlled process that allows a cell to respond to changes in its surroundings. It serves as an on/off switch for controlling when proteins are created as well as a volume control for increasing or decreasing the amount of proteins produced.

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Reactive oxygen species (ROS) are unstable, or reactive, compounds that result from the partial reduction of oxygen. ROS can cau
soldier1979 [14.2K]

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OH, H2O2 and O−2

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Reactive oxygen species (ROS) can be defined as highly reactive chemical compounds formed from molecular oxygen (O2). ROS are generated as a normal product of cellular metabolism, and also as a response to different environmental/internal cellular stimuli (e.g., cytokines, xenobiotics, pathogenic invasion). For example, hydroxyl radicals (·OH) are a type of ROS generated in the mitochondria which are capable of inducing oxidative stress in different cells and also trigger chronic inflammation. Moreover, hydrogen peroxide (H2O2) molecules represent another type of ROS which are produced during the stereoselective deamination of amino acids, i.e., the building blocks of proteins. These molecules (H2O2) exhibit toxic effects on the cell (e.g., DNA damage). Finally, singlet oxygen (1O2) is an excited state of molecular oxygen (O2) that is generated during photosynthesis in the photosystem II (PSII) of chloroplasts.

7 0
3 years ago
Which set of values tells us if the reaction is at equilibrium?
Yanka [14]

Answer:

C

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A system is at equilibrium when the rates of opposing reactions are equal.

Answer A does not show the rate of reactions, it only shows concentrations of reactants.

Answer B only shows constants, it does not show rates of reactions.

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