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Nadya [2.5K]
3 years ago
15

Which of the following is a chemical reaction? A.breaking a glass pane B.freezing water B.digestion of food C.cutting down a tre

e D.evaporation of rubbing alcohol
Biology
2 answers:
Illusion [34]3 years ago
9 0

The correct answer is option B, that is, digestion of food.

Digestion of food in the body is a decomposition reaction, it is a kind of chemical reaction in which single compound dissociates into two or more basic components. In the process of digestion, proteins, carbohydrates, and fats dissociate to basic constituents, which provide energy to function.  

Digestion of food is regarded as chemical change as different chemical reactions occur at the time of food digestion.  


joja [24]3 years ago
3 0
The answers A. C. D. are all physical reactions 

The answer is B. Digestion of food 

When food is digested it is chemically broken down 

Hope this help! 
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What two processes must take place in order to go from a gene to a protein?
yanalaym [24]

Most genes contain the information needed to make functional molecules called proteins. (A few genes produce other molecules that help the cell assemble proteins.) The journey from gene to protein is complex and tightly controlled within each cell. It consists of two major steps: transcription and translation. Together, transcription and translation are known as gene expression.

During the process of transcription, the information stored in a gene's DNA is transferred to a similar molecule called RNA (ribonucleic acid) in the cell nucleus. Both RNA and DNA are made up of a chain of nucleotide bases, but they have slightly different chemical properties. The type of RNA that contains the information for making a protein is called messenger RNA (mRNA) because it carries the information, or message, from the DNA out of the nucleus into the cytoplasm.

Translation, the second step in getting from a gene to a protein, takes place in the cytoplasm. The mRNA interacts with a specialized complex called a ribosome, which "reads" the sequence of mRNA bases. Each sequence of three bases, called a codon, usually codes for one particular amino acid. (Amino acids are the building blocks of proteins.) A type of RNA called transfer RNA (tRNA) assembles the protein, one amino acid at a time. Protein assembly continues until the ribosome encounters a “stop” codon (a sequence of three bases that does not code for an amino acid).

The flow of information from DNA to RNA to proteins is one of the fundamental principles of molecular biology. It is so important that it is sometimes called the “central dogma.”

Through the processes of transcription and translation, information from genes is used to make proteins.

5 0
3 years ago
The fossil record documents trends in which brains that are large relative to body size evolved in certain lineages, including h
REY [17]
The correct response is this: NATURAL SELECTION FAVORED THE EVOLUTION OF LARGER BRAINS, THIS SUGGESTS THAT THE BENEFITS OF LARGE BRAIN OUTWEIGHS THE COSTS.
In fossils record, the shift from Australopithecus to homo is characterized by larger body and brain sizes and all through subsequent evolution, brain size has to continue to get bigger. The possession of large brain make man to be much more advanced in thinking than all other animals.
7 0
3 years ago
Sediment can be carried by
lbvjy [14]
I'd say option 4, because all of those are capable of changing the enviroment
3 0
3 years ago
Read 2 more answers
I need this one quick for a timed assignment:
Sindrei [870]

Answer:

the answer is B

Explanation:

3 0
3 years ago
After infection of a cell, a viral particle must transport itself to the nucleus in order to produce viral proteins. What is the
kykrilka [37]

Answer:

Double-stranded DNA

Explanation:

If a virus requires to transport its genome in the nucleus to produce viral protein then the viral genome content must be DNA. This DNA of the virus will use the RNA polymerase of the host cell and will first convert into mRNA in the nucleus.

Then the mRNA of the virus will come out of the nucleus because the protein synthesis takes place outside the nucleus and in the cytoplasm. So in the cytoplasm by using host translational machinery the viral mRNA will code for viral proteins. So the correct answer is double-stranded DNA.

3 0
3 years ago
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