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Andrej [43]
2 years ago
5

A student conducted an experiment to determine the molar concentration of solutes in chicken eggs. Eggs were soaked in vinegar t

o remove the shells the eggs were then placed in sucrose solutions of different concentrations. The data is shown in the table below.
Sucrose
Concentration Inltial Mass Final Mass Change in Marss Percent Change
(Molar) (g) (g) (g) in Mass
0 78.50 81.73 3.23 4.11
0.5 79.11 77.50 -1.61 -2.04
1.0 80.75 75.14 -5.61 -7.12
2.0 76.99 66.64 -10.35 -13,44
b. Using the data, determine the molar concentration of chicken egg cytoplasm and justify your answer.
c. Movement of water and nutrients is critical for the survival of plants. Using the concept of water potential, explain the role of positive and negative pressure in the transport of water and nutrients throughout a vascular plant.
Biology
1 answer:
kvasek [131]2 years ago
8 0

Answer:

Explanation:

b. Based on the graph, the molar concentration is -0.32 M.

c. When water moves from areas with high water potential to areas with low, the phloem cells accumulate sugars. This results in transpiration.

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Griffith's experiments with S. pneumoniae were significant because they showed that traits could be transferred from one organis
Sladkaya [172]

Answer:

d.The transferred traits were heritable.

Explanation:

Griffith's experiments with S. pneumoniae were significant  because they showed that traits could be transferred from one organism to another and these transferred traits are known to be as heritable traits. In another experiment carried out by Hershey and Chase experiment it was confirmed by the results that DNA is actually the hereditary material not the protein.

7 0
2 years ago
A (n) inhibitor has a structure that is so similar to the substrate that it can bond to the enzyme just like the substrate. 2. a
Studentka2010 [4]
The answers are as follows:
1. <span>An inhibitor has a structure that is so similar to the substrate that it can bond to the enzyme just like the substrate: t</span>his is called competitive inhibitor. A competitive inhibitor will compete with the substrate for the active site of the enzyme and bind to the active site, thus incapacitating the substrate from binding to the active site.
2.  An inhibitor binds to a site on the enzyme that is not the active site: this is called non competitive inhibitors. Non competitive inhibitors bind to other site in the enzyme which is not the active site of the enzyme. The binding of the inhibitor changes the conformation of the enzyme as well as the active site, thus making it impossible for the substrate to bind to the enzyme effectively.
3. <span>usually, a(n) inhibitor forms a covalent bond with an amino acid side group within the active site, which prevents the substrate from entering the active site or prevents catalytic activity: this is called irreversible or permanent inhibition. Permanent inhibitors form covalent bonds with the enzyme and prevent substrate from binding to the enzyme.
4. T</span><span>he competitive inhibitor competes with the substrate for the ACTIVE SITE on the enzyme: The active site of an enzyme is the place where the substrate normally bind in order to activate a enzyme. Competitive inhibitors are those inhibitors that compete with the substrate for the active site of the enzyme and prevent the substrate from binding there.
5. W</span><span>hen the noncompetitive inhibitor is bonded to the enzyme, the shape of the ENZYME is distorted. The non competitive inhibitors are those inhibitors that bind to other places in the enzyme instead of the active site. The binding of the non competitive inhibitor usually distort the shape and the conformation of the enzyme thus preventing the substrate from binding to it effectively.
6. E</span><span>nzyme inhibitors disrupt normal interactions between an enzyme and its SUBSTRATE. The principal function of enzyme inhibitor is to prevent the substrate from binding to the appropriate enzyme. This is usually done in the human system in order to regulate the activities of enzymes.</span>
6 0
2 years ago
Two true-breeding stocks of pea plants are crossed. One parent has red, axial flowers, and the other has white, terminal flowers
Debora [2.8K]

Answer:

Explanation:

<em>The probability of producing plants with white axial flowers would be 1/16.</em>

From the illustration, All F1 individuals had red, axial flowers. It thus means that red and axial genes are dominant over white and terminal genes in the pea plant.

Let us assume that the allele for flower color is A (red) and a (white); and the allele for flower location is B (axial) and b (terminal).

Pure-breeding red, axial flower = AABB

Pure breeding white, terminal flower = aabb

AABB   x    aabb

F1 genotype = AaBb - all red and axial

At F2:

AaBb   x   AaBb

Progeny

<em>9 A_B_ red/axial</em>

<em>3 A_bb red/terminal</em>

<em>3 aaB_ white/axial</em>

<em>1 aabb - white/terminal</em>

Hence, the probability of producing plants with white axial flowers in the F2 generation is 1/16.

8 0
2 years ago
Check your understanding
wel

The fraction of offspring with black coat color and straight fur is 9/16.

Explanation:

Information given:

black coat colour and straight fur - dominant genotype BBCC, BbCc

yellow coat colour and curly fur - recessive genotype  bbcc

Both the traits are independently assorted. The fur colour and fur type is not present on the same chromosome and are not sex linked.

The genotype of the parents are:

BbCc X BbCc

Punnet square shows:

          BC           Bc          bC        bc

BC  BBCC   BBCc        BbCC   BbCc

Bc  BBCc   BBcc          BbCc    Bbcc

bC BbCC    BbCc         bbCC   bbCc

bc  BbCc      Bbcc         bbCc    bbcc

9 BLACK STRAIGHT

 3 BLACK CURLY

 3 YELLOW STRAIGHT

  1  YELLOW CURLY

9/16 is the fraction of progeny to be black coat colour and straight fur.

5 0
2 years ago
Madge” was found wandering the streets of New Jersey. She was brought to the attention of a licensed clinical social worker beca
Effectus [21]

Answer:

Madge is likely to have schizophrenia.

Explanation:

Schizophrenia is a mental disorder that causes an individual to suffer delusions and hallucinations that cause totally abnormal and parranoic behaviors.

As has already been said, schizophrenia causes altered and abnormal behaviors, confused thoughts and difficulties in adapting to reality. It is a very disabling disease and can cause an individual to completely lose control of his mental faculties.

Madge's behavior shows that he has confused thoughts, paranoid behaviors and loss of reality, so we can say that he is likely to have schizophrenia.

7 0
2 years ago
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