1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
WITCHER [35]
4 years ago
12

Most molecular biologists think that viruses originated from fragments of cellular nucleic acid. Which of the following observat

ions supports this theory?
A) Viruses contain either DNA or RNA.
B) Viruses are enclosed in protein capsids rather than plasma membranes.
C) Viruses can reproduce only inside host cells.
D) Viruses can infect both prokaryotic and eukaryotic cells.
E) Viral genomes are usually more similar to the genome of the host cell than to the genomes of viruses that infect other cell types.
Biology
2 answers:
il63 [147K]4 years ago
4 0

Answer:

Option A, Viruses contain either DNA or RNA.

Explanation:

Virus is a non-living microscopic molecule that requires a host to live in and reproduce. All the viruses have nucleic acid either in the form of DNA or RNA. DNA or RNA is genetic material that is enclosed with in a membrane known as capsid. Capsid is also made up of protein. They are extremely small, even smaller than a normal cell and only consist of package of nucleic acid and protein.

Hence, option A is correct

astraxan [27]4 years ago
4 0

Answer:

Option (E).

Explanation:

Virus is the organism that lies between the border of the living and non living organisms. Viruses can be harmful for the living organisms and some viruses are used in the biotechnology as well.

The viral genomes is made of nucleic acids as it can be either DNA or RNA or both. This can be best illustrated as all the living organisms has nucleic acid as their genetic material. The genome of the virus has the similar properties with the host cells that are infected by the virus.

Thus, the correct answer is option (E).

You might be interested in
Burning fossil fuels releases oxides of sulfur and nitrogen. these air pollutants can be responsible for question 5 options:
aev [14]
Most likely A or E.. not completely sure but A and E<span />
3 0
3 years ago
List and describe three molecular methods use to analyze DNA in the laboratory
Arada [10]












































© 1998, 1999 Gregory Carey Chapter 7: The New Genetics - 1 Chapter 7: The New Genetics—Techniques for DNA Analysis Introduction Before the 1980s, finding the genotype of an individual usually involved various laboratory assays for a gene product—the protein or enzyme. The cases of the ABO and Rhesus blood groups are classic examples of how one infers genotypes from the reaction of gene products with certain chemicals. In the mid 1980s, genetic technology took a great leap forward with the ability to genotype the DNA itself. The geneticist could now examine the DNA directly without going through the laborious process of developing assays to detect individual differences in proteins and enzymes. Direct DNA analysis had the further advantage of being able to identify alleles in sections of DNA that did not code for polypeptide chains. As a result of these new advances, the number of genetic loci that could be detected increased exponentially and soon led to the identification of the genes for disorders that had remained a mystery for the better part of this century. In this chapter, the major molecular techniques are outlined. The purpose is to provide a quick and understandable reference for the social scientist. The content of this chapter is not something that is required to understand genetics, what genes are, or how they relate to human behavior. Indeed, this chapter may be skipped without any great loss of continuity. Hence, only the essentials are given and the reader interested in the laboratory science behind the techniques is referred to contemporary textbooks on molecular genetics. We begin by defining a series of basic tools and techniques. © 1998, 1999 Gregory Carey Chapter 7: The New Genetics - 2 Basic Tools and Techniques: Basic tools: Electrophoresis Electrophoresis is a technique that separates small biological molecules by their molecular weight. It may be applied to molecules as large as proteins and enzymes as well as to small snippets of DNA and RNA. One begins the procedure by constructing a “gel”—a highly viscous material the actual chemistry of which need not concern us. Purified copies of the biological specimen are then injected into a “starting lane” at one end of the gel. Finally, a weak electric current is passed through the gel for a specified amount of time. Gravity and the electric current cause the biological molecules to migrate to the opposite end of the gel. The extent to which any molecule moves depends upon its electrical charge, molecular weight, the viscosity of the gel, the strength of the current, and the amA. The simplest method to denature DNA is to h33///////////////////////(http://psych.colorado.edu/~carey/hgss/hgsschapters/HGSS_Chapter07.pdf) # cited 
7 0
3 years ago
Translate this RNA strand into amino acids
Ostrovityanka [42]

Answer:

AGUUCAGUAAUC

Explanation:

This might be slightly wrong, it was somewhat difficult for me to keep up with which letter I was on. Adenine always pairs with Uracil and Guanine always pairs with Cytosine.

3 0
3 years ago
My sister lives with my parents into negative <br><br>​
Licemer1 [7]

Answer:

My sister does not live with my parents

7 0
3 years ago
Read 2 more answers
Which partly explains why the domestication of animals tended to increase the human food supply?
Alenkinab [10]

Answer:

A

Explanation:

Before domestication of animals, these animals were wild and early humans used to hunt for food. The hunting process  was not always successful and took a lot of energy from the body. Domestication of these animals made food available and other conveniences. An example is cows that emanated from the domestication of wild aurochs. They provided the milk and meat for humans and also labored in the farm in the cultivation of domesticated plants.

6 0
3 years ago
Other questions:
  • A group of tissues working together in a related fashion is called
    14·1 answer
  • Please help me write this paragraph!!
    14·1 answer
  • What does DNA give instructions for
    8·2 answers
  • The illustration shows homologous structures among a human arm, a seal forelimb, a bird wing, and a bat wing. explain how the st
    9·1 answer
  • Rats carry bacteria that cause bubonic plaque. Fleas that bite the rats
    15·1 answer
  • 20 points brainlist and I’ll awnser one of your questions pleaseee awnser Choose one of the compounds from the table Sodium carb
    7·1 answer
  • What planet is marked by an arrow in the image below?
    5·2 answers
  • Thermoregulation is a specific type of homeostasis where certain higher animals must maintain their internal body temperature. T
    8·2 answers
  • 17. The lungs and
    12·1 answer
  • Which is a cause of wind? solar eruptions an uneven heating of the atmosphere a sunny weather pattern followed by a cloudy weath
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!