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IgorC [24]
3 years ago
12

Which best explains why viruses do not have special structures or enzymes that allow them to make their own food? Viruses can us

e energy of living cells that they infect. Viruses can replicate inside a host that they infect. Viruses can cause contagious illnesses in host cells. Viruses integrate their RNA or DNA into infected cells.
Biology
1 answer:
padilas [110]3 years ago
6 0

Answer:

Viruses can use energy of living cells that they infect.

Explanation:

Hope it helps.

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Genetically identical armadillos were kept in the same controlled environment from birth and provided the same diet. Even though
Vlada [557]

Phenotypic variations in genetically identical organisms that grow in the same controlled environment may be due to mutation.

<h3>Mutation</h3>

This refers to a sudden change to the DNA sequence of living organisms.

When the DNA base sequence of organisms changes, the effect is shown in the morphology of organisms.

For organisms that are genetically identical but grow in different environments, phenotypic variations might exist as a result of environmentally acquired traits during the struggle to adapt to their environments.

In the same environment, however, genetically identical organisms are not expected to be phenotypically different, unless a mutation to the DNA of one has occurred.

More on mutation can be found here: brainly.com/question/17106056

7 0
2 years ago
DNA Polymerase helps copy a DNA molecule during the process of what?
PtichkaEL [24]
The DNA polymerases are enzymes that create DNA molecules by assembling nucleotides, the building blocks of DNA. These enzymes are essential to DNA replication and usually work in pairs to create two identical DNA strands from one original DNA molecule. During this process, DNA polymerase “reads” the existing DNA strands to create two new strands that match the existing ones.

Every time a cell divides, DNA polymerase is required to help duplicate the cell’s DNA, so that a copy of the original DNA molecule can be passed to each of the daughter cells. In this way, genetic information is transmitted from generation to generation.

Before replication can take place, an enzyme called helicase unwinds the DNA molecule from its tightly woven form. This opens up or “unzips” the double stranded DNA to give two single strands of DNA that can be used as templates for replication.

DNA polymerase adds new free nucleotides to the 3’ end of the newly-forming strand, elongating it in a 5’ to 3’ direction. However, DNA polymerase cannot begin the formation of this new chain on its own and can only add nucleotides to a pre-existing 3'-OH group. A primer is therefore needed, at which nucleotides can be added. Primers are usually composed of RNA and DNA bases and the first two bases are always RNA. These primers are made by another enzyme called primase.

Although the function of DNA polymerase is highly accurate, a mistake is made for about one in every billion base pairs copied. The DNA is therefore “proofread” by DNA polymerase after it has been copied so that misplaced base pairs can be corrected. This preserves the integrity of the original DNA strand that is passed onto the daughter cells.



A surface representation of human DNA polymerase β (Pol β), a central enzyme in the base excision repair (BER) pathway. Image Credit: niehs.nih.gov

Structure of DNA polymerase

The structure of DNA polymerase is highly conserved, meaning their catalytic subunits vary very little from one species to another, irrespective of how their domains are structured. This highly conserved structure usually indicates that the cellular functions they perform are crucial and irreplaceable and therefore require rigid maintenance to ensure their evolutionary advantage.

7 0
3 years ago
Explain why photosynthesis considered to be an anabolic, endergonic process.
mixas84 [53]
<span>photosynthesis is considered to be anabolic, because it is a process of growth, anabolic being the term used coming from anabolism which is synthesis of proteins or growth, and endergonic being because it is photosynthesis is a process in which heat or energy is absorbed , this being from the sun. Endergonic process are growth processes and this is why photosynthesis is considered to be anabolic and endergonic.</span>
6 0
3 years ago
List The properties of S waves and P waves
galina1969 [7]
S waves are slower than P waves and they can only travel through solid rock. S waves move the particles it pushes through up and down or side to side (perpendicular to the motion of the S waves energy).
7 0
3 years ago
Which of these is a major function of RNA?
ella [17]
RNA stands for ribonucleic acid. It's primary function is to make ribosomes, hence the answer is 'a'
8 0
3 years ago
Read 2 more answers
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