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
Dmitrij [34]
3 years ago
12

1. A piece of pure gold (Au) has a volume of 50 cmWhat is its mass?

Biology
1 answer:
krok68 [10]3 years ago
7 0

Answer:

96.5g

Explanation:

Given parameters:

Volume of Au = 50cm³

Density of Au = 19.3 g/cm³

Unknown:

Mass of the  gold  = ?

Solution:

Density is the mass per unit volume of a compound.

 Density  = \frac{mass}{volume}

 Mass  = density x volume

Insert the parameters and solve;

   Mass  = 19.3 g/cm³ x 50cm³  = 96.5g

You might be interested in
Proteins, large complex molecules, are major building blocks of all living organisms. Discuss the following in relation to prote
Anastasy [175]

Answer:

Proteins, large complex molecules, are major building blocks of all living organisms. Discuss the following in relation to proteins.

(a) The chemical composition and levels of structure of proteins.

Proteins are chemically macromolecules formed by manomeric units called amino acids. The structural organization of proteins is as follows:  Primary, Secondary, Tertiary and Quaternary.

(b) The roles of DNA and RNA in protein synthesis

From DNA, ribosomal RNA is formed, a type of RNA present in ribosomes that is responsible for protein synthesis. Therefore, the role of DNA in protein synthesis is essential: without DNA, there are no proteins.

(c) The roles of proteins in membrane structure and transport of molecules across the membrane

Proteins can work by transporting ions in different ways.

Explanation:

(a) The chemical composition and levels of structure of proteins.

Proteins are chemically macromolecules formed by manomeric units called amino acids, these have in their structure a carboxyl group and amino group, attached to the same carbon. To be assimilated by the body, proteins must be degraded in the amino acids that make them up.

The amino acids are linked together by peptide bonds. In those bonds, the amino group of one amino acid reacts with the carboxyl group of the other.

The structural organization of proteins is as follows:

Primary: Sequence of the amino acids in the chain with peptide bonds.

Secondary: Spatial arrangement of the amino acids of a protein. They stabilize by means of hydrogen bonds. There are two types: the propeller a and the folded blade b.

Tertiary: Three-dimensional arrangement of the polypeptide chain, stabilized by forces of Waals.

Quaternary: Union of weak bonds of arias polypeptic chains that originate a protein complex.

(b) The roles of DNA and RNA in protein synthesis

RNA fulfills numerous functions, the most important being protein synthesis, in which it copies the genetic order contained in the DNA to use it as a standard in the manufacture of proteins and enzymes and various substances necessary for the cell and the organism. For this, it goes to the ribosomes, which operate as a kind of molecular protein factory, and it does so following the pattern that the DNA prints on it.

(c) The roles of proteins in membrane structure and transport of molecules across the membrane

The cells contain proteins that are embedded in the lipid bilayer of their plasma membranes. These proteins can work by transporting ions in different ways. Then, most of the water-soluble ions and molecules are unable to spontaneously cross the lipid bilayer of the membrane (which act as a barrier) and require the concurrence of special carrier proteins or protein channels. In this way the cell maintains concentrations of ions and small molecules different from those prevailing in the external environment.

7 0
3 years ago
(WILL GIVE BRAINLIEST) A researcher is curious about whether treating mice kindly will enhance their ability to run through a ma
Zina [86]

Both a and b are the correct answer

3 0
3 years ago
Read 2 more answers
Plants get the energy they need for photosynthesis by absorbing sugars<br><br> true<br> false
garri49 [273]

Answer:

false

Explanation:

it is because sugar not needed in photosynthesis

8 0
3 years ago
Given the parents AABBCc × AabbCc, assume simple dominance for each trait and independent assortment. What proportion of the pro
galina1969 [7]
The answer is C) 3/4

Let's analyze separately each of the traits:

Parental generation: AA x Aa
F1 generation:       AA AA Aa Aa
So, all progeny will <span>phenotypically resemble the first parent.

</span>Parental generation: BB x bb
F1 generation:       Bb Bb Bb Bb
So, all progeny will <span>phenotypically resemble the first parent.
</span>
Parental generation: Cc x Cc
<span>F1 generation:       CC Cc Cc cc
</span>Only 3 (CC, Cc, Cc) out of 4 progeny will <span>phenotypically resemble the first parent.

The genotypes for first two traits will not affect </span>phenotypical resemblance to the first parent. So, it only counts the third trait, for which the chance to have progeny that <span>phenotypically resemble the first parent is 3/4.</span>
7 0
3 years ago
How long can salmon live out of water
timofeeve [1]

A salmon can live out of water for 2 hours

8 0
3 years ago
Read 2 more answers
Other questions:
  • What is responsible for determining which direction water will diffuse across the plasma membrane of cells?
    9·1 answer
  • Ribosomes provide the scaffolding on which trnas interact with mrna during translation of an mrna sequence to a chain of amino a
    6·1 answer
  • which phrase best describes the process of meiosis? 1) Occurs in the body cells 2) Results in the genetically identical cells 3)
    12·1 answer
  • Can someone please write a 250-word essay about one of these systems
    8·1 answer
  • What happens when a person with a skin fungus shares a towel with another person
    14·1 answer
  • What is the largest catfish in georgia
    15·2 answers
  • Why do people grow hair?​
    6·1 answer
  • A part of the auditory pathway responsible for auditory reflexes is the
    12·1 answer
  • Genetic codes contain:
    11·1 answer
  • What does the fully charged ATP LOSE to become uncharged?
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!