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777dan777 [17]
3 years ago
11

Which molecule is used by cells as an energy source? Many substances, such as cholesterol, bind to ________ on the cell membrane

, triggering endocytosis.
Biology
1 answer:
Mazyrski [523]3 years ago
4 0

ATP is used as an energy source for cells

Many substances, such as cholesterol, bind to receptor sites on the cell membrane, triggering endocytosis.

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Which molecule is active during the last step of DNA replication?
stepan [7]

Correct answer: Option D- DNA ligase

Explanation: In option A, thymine is a nucleotide, so it is present throughout the replication process, wherever it is required. It is added to the newly formed DNA. In option B, Helicase enzyme is active during initiation and elongation stage, as it facilitates the opening of the winded DNA strands. Option C is nucleotidase and it has no role in DNA replication. So, the correct answer is DNA ligase, which is option D.

The okazaki fragments formed during DNA replication are sealed at the end. And in this step, DNA ligase is used. It catalyzes the formation of phosphodiester bond between the nucleotides of okazaki fragments. So it is the last active molecule of the process.

8 0
3 years ago
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Estas de acuerdo con la aplicación del principio de la física en ecología:¨la energía no desaparece ni se destruye, solo se tran
saveliy_v [14]

Answer:

Esta afirmación es correcta ya que la ley de conservación de la energía es también aplicable a sistemas vivos  

Explanation:

La ley de la conservación de la energía (la cual es la primera ley de la termodinámica) indica que la energía no se puede crear ni se puede destruir, solamente se transforma, de un tipo a otro. La ley de la conservación de la energía es de vital importancia para entender la existencia del mundo natural. En ecología, la energía fluye de un nivel trófico a otro en forma de biomasa, es decir, dentro de la cadena alimentaria. Esta energía no se puede crear ni destruir sino que es almacenada en los organismos, los cuales representan sistemas abiertos que intercambian materia y energía con el medio. Una vez dentro del organismo, una parte de esta energía es transformada (en plantas, por ejemplo, la energía es convertida en enlaces químicos durante la síntesis de carbohidratos), mientras que otra parte de la energía se elimina al exterior (por ejemplo, se disipa en forma de calor), pero la energía no se crea ni se destruye.

3 0
3 years ago
What is the difference between goodness of fit and personality conflict?
asambeis [7]

I hope this helps

The compatibility of a person’s temperament with his surrounding environment is referred to as “goodness of fit.”

Some temperaments and environments seem to naturally fit together, while others do not.

There are two types of “Goodness of Fit:”

<span> how that trait interacts with the environment how it interacts with the people in that environment. </span>

Any trait in and of itself is not a problem; rather, it is the interaction that determines the “acceptability” of that trait.

4 0
3 years ago
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What kind of reservoir shaped a lot of the Grand Canyon? How do you know?
Kaylis [27]
Great reading kid hope u pass
8 0
2 years ago
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Dr. Semmelweis, a physician from Austria, wanted to locate the cause of childbed
tatuchka [14]

Answer:

Hypothesis

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A hypothesis is an educated guess, based on evidence provided by the initial question the scientist had. I hope I helped you:)

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