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monitta
3 years ago
5

Why do scientists break earth's history down into smaller pieces​

Biology
1 answer:
nevsk [136]3 years ago
8 0

Answer:

to see if they can find any other information to see what it worth how valuable it is or wht it is

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What is the role of ATP when large molecules need to be transported across the cell membrane against the concentration gradient?
Anon25 [30]

Answer:

b. the bond between the phosphate groups is broken to release energy

Explanation:

  • Phosphate groups are negatively charged => there is a pull between the two groups

=> it's easy to break this bond & ATP is unstable

=> ATP has a lot of free energy

  • breaking the bond between phosphate groups makes the molecules more stable (aka contains less free energy)

=> delta G <0

=> breaking this bond releases energy

  • the energy released by ATP is then used to transport large molecules against the concentration gradient
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Which of the following results when a sperm cell fertilizes an egg cell?
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The answer is D. Zygote. A zygote is formed by the fertilization of an egg by a sperm. A gamete is what we refer to an egg or sperm as. Fertilization is what we call when a sperm and an egg come together, but it is not the product of the two.
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2 years ago
A cactus with long spines protects itself from animals better than a cactus with short spines. According to natural selection, _
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<span>Long-spined cacti will survive longer and reproduce more often than short-spined cacti</span>. Because natural selection suggests that organisms with certain traits that give them better chance at survival or reproductive rate will be pass on to their offspring.
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3 years ago
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Bacteria need at least _____ hours to grow enough cells to cause illness.
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It needs at least 4 hours to grow to cause illness :)
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What amino acids do trypsin and chymotrypsin cut at?
Vikentia [17]

Answer:

Trypsin cuts at lysine and arginine amino acid residues at the carboxyl end. Chymotrypsin cuts at tryosine , phenylalanine, and tryptophan amino acid residues at the carboxyl end.

Explanation:

Trypsin and chymotrypsin are known as proteolytic enzymes which are actively involved in the digestive system. They are both secreted by the pancreas and are majorly involved in the breakdown of protein in the small intestine.

Trypsin cuts at lysine and arginine amino acid residues at the carboxyl end. Chymotrypsin cuts at tryosine , phenylalanine, and tryptophan amino acid residues at the carboxyl end.

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3 years ago
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