Hershey and chase performed an experiment in order to determine how bacteriophages infect bacteria and discovered that DNA is the genetic material.
<h3>
What is DNA?</h3>
This is referred to as deoxyribonucleic acid and is the genetic material of living organisms .
Hershey and chase performed an experiment using bacteriophages which contains protein and DNA by infecting it with bacteria and it was observed that DNA enters the host bacterial cell, but most of their protein does not.
This therefore means that DNA is regarded as the hereditary material.
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Answer:
The correct answer is- 4) Environmental
Explanation:
Environmental wellness help to learn about environmental health. It involves creating a pollution-free natural environment, protecting our natural resources, eliminating toxic and hazardous substances from the environment.
Environmental wellness does not only encompass our relationship with the environment and nature but it also include our relationship with our personal surrounding.
Therefore we should eliminate any potential toxic hazard from our surrounding to get protection from it and to improve environmental wellness. So the right answer is 4.
The strategy is to look for unique processes that occur in virus infected cells but not uninfected cells. Look at some of the enzymes encoded by viruses, and the processes they catalyze to find ideas for inhibiting virus replication.Antiviral drug<span>, </span><span>any agent that is used in the </span>treatment<span> of an </span>infectious disease<span> caused by a </span>virus. Viruses are responsible for illnesses such as HIV/AIDS<span>, </span>influenza<span>, </span>herpes simplex<span> type I (cold sores of the mouth) and type II (genital herpes), </span>herpes zoster<span> (shingles), viral </span>hepatitis<span>, </span>encephalitis<span>, infectious </span>mononucleosis<span>, and the </span>common cold<span>.</span>
Answer:
<em><u>H1: false, the observations of the molecules do not support the hypothesis...</u></em>
Explanation:
The cell membrane is comprised of a phospholipid bilayer, proteins, and cholesterol. These components help the membrane to maintain its selective permeability and concentration of solutes and water.
The lipid molecules have polar hydrophilic heads and hydrophobic tails. These only readily allow for the movement of small non polar molecules. Other substances, like charged ions and large molecules require transport proteins to move in and out of the cell. Hypothesis: H+ is small and should be able to move freely through the membrane, While glucose is large and cannot move freely
- Observing H+, despite being very small these cannot easily pass through the membrane. They require transport proteins called channels for their free movement or passive movement across the membrane.
- For glucose, these molecules pass through specialized channels in facilitated diffusion. They move down their concentration gradient into the cell. To move out of the cell against its concentration gradient glucose requires ATP for active transport.
- Cortisol, is a large steroid hormone, taken into the cell by simple diffusion across the lipid membrane, down its concentration gradient.
The correct option is D. There are four different nitrogenous bases in DNA molecules; these bases are joined together by different forces including hydrogen bonds. In DNA molecules, there are two hydrogen bonds between adenine and thymine while there are three hydrogen bonds between cytosine and guanine. Thus, the hydrogen bonds between cytosine and guanine is the stronger.