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adell [148]
3 years ago
10

Lead is melted and is poured into a mold to make fishing weights. This is an example of a________change.

Biology
1 answer:
Anna71 [15]3 years ago
6 0
Physical change because it does not combine with any other substance it just changes the state of matter
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5. Is the following sentence accurate?
hichkok12 [17]

The cell that provides life with chemical energy. Light energy is converted by photosynthesis into chemical energy that is stored in glucose, and this energy is then released during cellular respiration to create ATP.

<h3>What does the term "cellular respiration" mean?</h3>

While cells are aerobic respiration, oxygen may be present or not. But, because the cell seems to "respire" by consuming molecular oxygen (as an electron acceptor) and releasing carbon dioxide, the process is essentially known as "cellular respiration" (as an end product).

<h3>What happens during cellular respiration?</h3>

ATP is created during cellular respiration as a reaction product between glucose and oxygen. Water and carbon dioxide are released as by products. The three stages of aerobic cellular respiration are glycolysis, an anaerobic process, and the Krebs cycle.

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4 0
1 year ago
You experimentally change the DNA sequence directly upstream of a start codon of an operon in E coli to investigate the function
Phoenix [80]

Answer:

Mutation occurred in ribosome binding site that serves as binding site for 30S ribosomal subunit of <em>E. coli</em> and allows the process of protein synthesis to begin.

Explanation:

The initiation of protein synthesis in bacteria requires binding of the ribosome to the ribosome binding site. The ribosome binding site in bacteria consists of the initiation codon "AUG" and the preceding Shine-Dalgarno sequence. The AUG initiation codon and Shine Delgrano sequence are around 10 bases apart.

The sequence is polypurine hexamer and is represented by 5' ...AGGAGG...3'. Shine-Delgrano sequence is complementary to the conserved sequence present at the 3' end of 16SrRNA of the 30S subunit of the bacterial ribosome. Binding of Shine Delgrano sequence of ribosome binding site and the complementary sequence of the 30S ribosomal subunit marks the first step in the initiation of protein synthesis.

Any mutation in the ribosome binding site would not allow the process of protein synthesis to start or would reduce the rate of the initiation of protein synthesis.

8 0
3 years ago
Which statement describes what happens to elements during radioactive decay
ira [324]

Answer:

3) they lose energy at a varying rate - is the correct answer.

Radioactive decay is defined as the process by which an unstable atomic nucleus loses its energy by emitting radiations. The decay is random and cannot be predicted earlier.

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Explanation:

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3 years ago
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He following diagram shows the branching tree diagram for some animals. (5 points)
Norma-Jean [14]

Answer:

d

Explanation:

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Describe a semipermeable membrane.​
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Answer:

A semipermeable membrane is a barrier that will only allow some molecules to pass through while blocking the passage of other molecules. A semipermeable barrier essentially acts as a filter. Different types of semipermeable membranes can block out different sized molecules. A semipermeable membrane can be made out of biological or synthetic material.

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