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Ket [755]
3 years ago
10

Any substance with constant composition

Biology
2 answers:
Dominik [7]3 years ago
6 0

Answer:

Pure substance

Explanation:

givi [52]3 years ago
4 0



Answer: carbon dioxide


Explanation:

A chemical substance is a form of matter having constant chemical composition and characteristic properties.[1][2] Some references add that chemical substance cannot be separated into its constituent elements by physical separation methods, i.e., without breaking chemical bonds.[3] Chemical substances can be simple substances[4], chemical compounds, or alloys. Chemical elements may or may not be included in the definition, depending on expert viewpoint.[4]

Chemical substances are often called 'pure' to set them apart from mixtures. A common example of a chemical substance is pure water; it has the same properties and the same ratio of hydrogen to oxygen whether it is isolated from a river or made in a laboratory. Other chemical substances commonly encountered in pure form are diamond (carbon), gold, table salt (sodium chloride) and refined sugar (sucrose). However, in practice, no substance is entirely pure, and chemical purity is specified according to the intended use of the chemical.
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Smaller dna fragments migrate _____ and further over a given period of time than larger fragments.
nordsb [41]

Smaller DNA fragments migrate <u>more quickly</u> and further over a given period of time than larger fragments.

<h3>Gel electrophoresis and DNA fragments</h3>

Gel electrophoresis is a method to separate DNA fragments (or RNA and other macromolecules) based on their size and charge, involving a gel called agarose. The molecules will travel through the gel at different speeds or in different directions, which allows them to be separated from each other.

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Learn more about DNA fragments here: brainly.com/question/17568989

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4 0
1 year ago
Recall the Jagendorf experiment (pasted below) was conducted wholly in the dark. Hypothesize what would happen if you were to mi
Alla [95]

Answer:

ATP production.

Explanation:

The result will be the production of ATP molecules if we place thylakoids in a beaker with a solution that mimics the chloroplast stroma in direct sunlight. The thylakoids are able to formed ATP in the dark because H+ gradient is required for ATP synthesis. The scientists find out that the light reactions were not necessary to establish the H+ gradient required for ATP synthesis by ATP synthase.

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3 years ago
Match the following terms and definitions,
tester [92]

Answer: adenosine triphosphate (ATP) - the high energy chemical compound with three phosphate groups that provides energy for all other cell activities

endocytosis - when cells engulf or ingest substances

cellular respiration - chemical reactions in plants and animals that break down food molecules into energy (ATP)

movement of particles or molecules from higher  concentration to lower concentration - diffusion

when cells expel or get rid of substances from within- exocytosis

a solution that has a higher salt concentration than the salt - hypertonic

the relatively constant state in the internal environment of an organism - homeostasis

Explanation:

Adenosine triphosphate or ATP is the energy currency that is required for providing energy for metabolic functions and activities in the body.

Endocytosis can be defined as the process through which a cell engulfs another cell or substances to get rid of them.

Cellular respiration can be defined as the process through which the food in the organisms is oxidized and broken into parts to release energy.

Diffusion involves the movement or transfer of gas, liquid, and solid particles from a region of higher to lower concentration without the requirement of semi-permeable membrane.

Exocytosis is a process in which the cell releases those substances that are required by the cell.

Hypertonic is a solution that has more solute concentration than solvent concentration.

Homeostasis is a tendency to maintain constancy in the internal environment of body in relation to changes occurring in the surrounding.

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3 years ago
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