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
slamgirl [31]
3 years ago
12

There are 20 different amino acids what makes one amino acid different

Chemistry
1 answer:
insens350 [35]3 years ago
8 0
Amino acids carry two functional groups: an amine group (-NH2) and a carboxylic acid group (-COOH). They are different because they have different side chains (R groups) attached to an alpha carbon that is specific to each amino acid.
You might be interested in
Which of the following is fansition<br>metallon<br>Akt<br>02 라<br>Sfeet​
kow [346]

Answer: 02 라

Explanation:

5 0
2 years ago
The half life for the decay of carbon- is years. Suppose the activity due to the radioactive decay of the carbon- in a tiny samp
Tems11 [23]

Answer:

The artifact is 570 years old. That is, 5.7 × 10² years.

Explanation:

Radioactive decay follows first order reaction kinetics.

Let the initial activity for fresh Carbon-14 be A₀

And the activity at any other time be A

The rate of radioactive decay is given by

dA/dt = - KA

dA/A = - kdt

Integrating the left hand side from A₀ to A₀/2 and the right hand side from 0 to t(1/2) (where t(1/2) is the radioactive isotope's half life)

In [(A₀/2)/A₀] = - k t(1/2)

In (1/2) = - k t(1/2)

- In 2 = - k t(1/2)

k = (In 2)/t₍₁,₂₎

t(1/2) is given in the question to be 5.73 × 10³ years

k = (In 2)/5730 = 0.000121 /year

dA/A = - kdt

Integrating the left hand side from A₀ to A and the right hand side from 0 to t

In (A/A₀) = - kt

A/A₀ = e⁻ᵏᵗ

A = A₀ e⁻ᵏᵗ

A = 2.8 × 10³ Bq.

A₀ = 3.0 × 10³ Bq.

2.8 × 10³ = 3.0 × 10³ e⁻ᵏᵗ

0.9333 = e⁻ᵏᵗ

e⁻ᵏᵗ = 0.9333

-kt = In 0.9333

- kt = - 0.06899

t = 0.06899/0.000121 = 570.2 years = 5.7 × 10² years

8 0
3 years ago
Write an assignment on primary sources of information on modern Indian history
Mama L [17]

Explanation:

NextGurukul

Next Gurukul

Learner's Section

WikiK-12 Wiki

AssessmentAssessments

ForumQ&A Forum

Educator's Section

MOOCMOOCs

Join Experts PanelJoin Experts Panel

Next WorldThe Next World

Finding exercises tough? Install LearnNext+ app to watch our videos and get a crystal clear understanding of concepts Install Now X

arrow_backSources of Information on Modern Indian History

Summary

Videos

References

A primary source of information for historians is the official records of the British administration. The British kept written records of every key instruction, meeting, transaction, investigation, plan, policy decision and agreement. They attached record rooms with all the important administrative institutions.

The British built specialized institutions like museums and archives to preserve important documents.

Historians gather important information about the provincial administrative system from the reports, memos, notings and letters preserved in the 19th century in the archives and record rooms across India.

For effective administration, the British carried out a number of surveys in the early 19th century.

By the end of the 19th century, censuses of all the Indian provinces were being carried out every ten years. This helped to collect information on the religion, caste and occupation of the people. These surveys have helped historians to collect information about modern India.

Personal diaries of personalities like Jawaharlal Nehru and Sardar Vallabhbhai Patel, newspapers, popular books like The Discovery of India and Glimpses of World History, autobiographies of personalities like Mahatma Gandhi, and accounts of travellers and pilgrims give a deep insight into the lives of the common people.

8 0
3 years ago
Different solutions of salt X are made up. What volume of: a) a 4 mol/dm³ solution contains 2 moles of X? b) a 6 mol/dm³ solutio
Gelneren [198K]

Answer:

a. 0.5dm³

b. 5x10⁻³dm³

Explanation:

a. A solution that is 4mol/dm³ contains 4 moles in 1dm³. The volume that contains 2 moles is:

2 moles * (1dm³ / 4mol) =

<h3>0.5dm³</h3><h3 />

b. And for the 6 mol/dm³ containing 0.03moles:

0.03 moles * (1dm³ / 6mol) =

<h3>5x10⁻³dm³</h3>
5 0
3 years ago
The tube that stores sperm cells
JulsSmile [24]

Answer:

here is the answer

Explanation:

The epididymis

5 0
3 years ago
Read 2 more answers
Other questions:
  • Which law did the U.S. Congress pass as a response to the Dust Bowl?
    8·1 answer
  • What ions exist in acid solutions
    11·1 answer
  • A sample of gas occupies 33 mL at -101 degrees Celsius. What volume does the sample occupy at 97degrees celsius? Plz help I have
    8·1 answer
  • If the tropospheric concentrations of OH and CF3CH2F are 8.1×105 and 6.3×108 molecules/cm3, respectively, what is the rate of re
    11·1 answer
  • Consider the following reaction at 25 °C: 4Fe(s) + 3O2(g) ⇌ 2Fe2O3(s) An equilibrium mixture contains 1.0 mol Fe, 1.0 × 10–3 mol
    6·1 answer
  • What is the h+ concentration for an aqueous solution with poh = 3.35 at 25 ∘c? express your answer to two significant figures an
    8·1 answer
  • A trend in the periodic table means?
    15·1 answer
  • Which of the following is necessary for photosynthesis?
    15·1 answer
  • I need help with the stuff highlighted in the blue
    13·2 answers
  • Draw the structures of the following covalent molecules.
    5·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!