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
docker41 [41]
3 years ago
13

Most vaccines are for viral infections. True False

Biology
1 answer:
anastassius [24]3 years ago
6 0

Answer:

True

Explanation:

You might be interested in
all but one describes a function of apoptosis. That is a) cell death that occurs when cells are exposed to toxins or are injured
natima [27]
The correct answer is A. Apoptosis is regulated cell death/suicide, not accidental.
4 0
3 years ago
Read 2 more answers
What impact does deforestation have on the carbon cycle?
Vlad [161]

Answer:

Deforestation can affect the water cycle and the carbon cycle. It will decrease the amount of transpiration. It will also increase the amount of carbon dioxide in the atmosphere by releasing the carbon dioxide as trees are burned and by decreasing photosynthesis.

8 0
3 years ago
How do radio waves help indirectly measure the distance of a star from earth?
madam [21]

As Earth orbits the Sun, this same principle is used by astronomers to determine the distance to nearby stars. ... Parallax is the first "inch" on the yardstick with which astronomers measure distances even further to objects.

3 0
3 years ago
Researchers have recently sequenced the genetic identities of nine ancient fully modern H. sapiens from sites in Italy, France,
dem82 [27]

Answer: D

Explanation:

8 0
3 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
Other questions:
  • In his breeding experiments, how did Mendel know which traits came from which pair of plants?
    8·1 answer
  • What is Vaginosis? List some of the members of the normal microflora of the female reproductive organs and discuss factors that
    5·1 answer
  • 2. The instructions for the traits of an organism are determined by
    10·2 answers
  • Organisms at the first trophic level in a food pyramid are:
    7·1 answer
  • Which of the following is not true concerning the Nereus
    9·1 answer
  • Why do the cells inside of your stomach get replaced every few days , but other cells in your body can live for weeks, months or
    7·1 answer
  • pzzzzzzzzzzzzzzzzz help me !!!! The blood sugar in your body is maintained by a gland that acts as an exocrine and endocrine gla
    10·2 answers
  • When people experience extreme back injuries they can lose the ability to move their bodies below a certain point. What part of
    7·1 answer
  • What was Anton van Leeuwenhoek’s contribution in the development of cell theory? A. He built the first compound microscope. B. H
    13·1 answer
  • THIS IS DUE TODAY!please HELP AND ANSWER CORRECTLY
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!