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
stellarik [79]
2 years ago
5

A scientist wants to make a DNA fingerprint, and she has used polymerase

Biology
1 answer:
Gelneren [198K]2 years ago
7 0

Answer:

I don't know the answer for this question

You might be interested in
Why is the percentage similarity in the gene always lower than the percentage similarity in protein.
Galina-37 [17]

Answer:

Synonyms in the genetic code exist and some species only use one synonym to get the same amino acid. The reason why the percentage is low in gene is because it does not involve a lot of processes compared to the proteins which undergo mRNA and tRNA to be coded as amino acids.

Explanation:

5 0
2 years ago
Iron-55 has a half-life of 3 years. How much of a 40 gram sample will remain after 12 years? A. 0 grams B. 4 grams C. 2.5 grams
Readme [11.4K]

Answer:

\boxed {\boxed {\sf C. \ 2.5 \ grams }}

Explanation:

We are asked to find how much of a 40 gram sample remains after 12 years.

Iron-55 has a half-life of 3 years. Therefore, after 12 years, 4 half-lives have been completed.

  • 12 years/3 years = 4 half-lives

Every time a half-life is completed, half of the sample's mass decays. Remember we start with a 40 gram sample.

  • 1 half- life: 40 g / 2 = 20 g
  • 2 half-lives: 20 g / 2= 10 g
  • 3 half-lives: 10 g / 2 = 5 g
  • 4 half-lives: 5 g / 2 = 2.5 g

There is also a formula that can be used to solve this problem.

A= A_o(\frac {1}{2})^{\frac{t}{hl}

Where A₀ is the initial amount, t is the time, and hl is the half-life.

We know 40 grams is the inital amount, 12 years is the time, and 3 years is the halflife.

  • A₀= 40 g
  • t= 12
  • hl= 3

A= 40 \ g (\frac{1}{2})^\frac{12}{3}

A= 40 \ g (\frac{1}{2})^4

A= 40 \ g * 0.0625

\bold {A= 2.5 \ g}

After 12 years, <u>2.5 grams </u> of Iron-55 will remain.

4 0
3 years ago
Phagocytes are unable to adhere to bacteria that have external capsules concealing their membrane carbohydrates. Our immune syst
ludmilkaskok [199]

Answer:

The correct answer is c) opsonins

Explanation:

Opsonization is a process in which proteins like antibodies and complement proteins called opsonins bind to the antigens and get it recognized by the phagocyted which destroys the antigen.

Especially when bacteria is having external capsule than it becomes difficult for phagocytes to attach to the capsular surface as the recognition molecule like membrane carbohydrate of antigen is concealed by capsule.

So to encounter this, antibodies like IgG and complement proteins like C3b attaches to the antigen and get it recognized and opsonized by the phagocytes like macrophages. This opsonization causes the destruction of antigen by enzymatic lysis.

8 0
3 years ago
Which is one of the five characteristics of life?
Thepotemich [5.8K]
One characteristic of life is that living things have different levels of organization -They have both molecular and cellular organization - They must have the ability to organize simple substances into complex ones. - They organize cells at several types of levels, namely: (a) Tissue- a group of cells that perform a common function (b) Organ - A group of tissues that perform a common function. (c) Organ system- a group of organs that perform a common function. (d) Organism- any complete living thing.
5 0
3 years ago
Read 2 more answers
What is the effect of the fermentation byproducts on the growing bacteria?
andriy [413]

Answer:

The byproducts cause the released of high concentration in the fermentation acids and the deceases in the level pf PH. It basically leads to inhibition of the growth of many bacteria. The toxicity at low PH value of the fermentation acids traditionally defined the uncoupling mechanisms. The fermentation acid are resistant bacteria with low PH and It able to generated the ATP and groe the low PH intracellular.

3 0
3 years ago
Other questions:
  • If an organism exceeds the range of tolerance what’s most likely to happen
    8·2 answers
  • Of the pH values below, which is considered "neutral" pH? A. 7.4 B. 9 C. 5.4 D. 7
    6·1 answer
  • Which cranial nerve carries visual information from the eyeball to the brain?
    14·1 answer
  • The four organic molecules found in organisms are carbohydrates, proteins, nucleic acids, and amino acids. t or f
    12·2 answers
  • For reasons that are not entirely clear, when animals make
    15·1 answer
  • If a consumer version of the gene database was created, what additional features would it need to be user-friendly?
    13·1 answer
  • Is the answer A,B,C,or D
    12·1 answer
  • Helppp, i need this asap
    11·1 answer
  • The first species to colonize an environment is called:
    7·1 answer
  • Which of the following structures is most likely damaged in the cell?
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!