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frozen [14]
3 years ago
13

1.Compare and contrast communication by molecular signal with communication by enzyme-linked receptor.

Biology
2 answers:
irakobra [83]3 years ago
7 0
They are different because they use different frequency
Alchen [17]3 years ago
6 0

they are different because they use different frequency

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A expresses dna that has been derived from another species. 2. dna that has been altered to contain genes, or portions of genes,
OlgaM077 [116]
1. A transgenic organism expresses DNA that has been derived from another species. These organisms have altered genomes and are generated in the laboratory for the purposes of research, for example, the "knock-out" mice are tansgenic mice with a particular gene of interest disabled. 
2. Recombinant DNA is the DNA that has been altered to contain genes, or portions of genes, from different organisms. The DNA molecules are formed in the lab using recombination methods to bring together genetic material from multiple sources and therefore creating sequences that are not found in the genome. 
3. Restriction enzymes are found naturally in bacteria and they cut DNA at specific nucleotide sequences. These enzymes are also called restriction endonucleases, they cleave DNA into fragments at or near specific recognition sites called restriction sites. They are found in bacteria and archaea and they serve to provide a defense mechanism against invading viruses.
4. Biotechnology is the use or alteration of organisms, cells, or biological molecules to produce food, drugs, or other goods. Living systems and organisms are used to make or develop products. Biotechnology enhances cellular and biomolecular processes to develop technologies and product for the purposes of improving life and health. 
5. Polymerase chain reaction is a technique that is used to quickly synthesize billions of copiies of a specific segment of DNA.  It is a quick and a very efficient way to generate many copies of DNA.  The process is applicable when there are small quantities of DNA to analyze. The events of PCR involves; separation of DNA strands, addition of primers, use of DNA polymerase to produce second strand of DNA. 
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8 0
3 years ago
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Explain the method scientists use to study how Earth’s atmosphere and climate have changed during the past million years.
Elanso [62]

Answer:

There are many methods used by the scientists to study the change of earth's atmosphere and climate over the past million years. The study is called paleoclimatology. Since there are no measurement tools during those era, it studies the past by using proxy data. Proxy data includes earth's sediments, tree rings, historical archives, ice cores, and etc.

Explanation:

4 0
2 years ago
Adding and removing energy can change the physical properties of a substance.
postnew [5]

Answer: True.

Explanation: Energy is being removed from the substance as it changes state. As energy is added to the liquid, particles throughout the liquid move faster. Boiling. When particles move fast enough to break away from other particles, they evaporate and become gas.

3 0
3 years ago
Помогите срочно!!! <br> Умоляю
Alexxandr [17]

огите срочно

Explanation:

6 0
3 years ago
Place the following events in muscle contraction in the correct sequence from first to last. 1. ATP binds to myosin head. 2. Myo
sladkih [1.3K]

Answer:

The correct sequence of muscle contraction from first to last is given below

Explanation:

step 1  myosin head interacts with actin

step 2 ATP binds to myosin head

step 3  ATP is converted to ADP and Pi

step 4  ADP and pi are released from myosin

step 5  Myosin head pivots in the power stroke

step 6  Myosin head is cocked back.

7 0
3 years ago
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