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solmaris [256]
2 years ago
11

A student is studying the amino acid sequence of a protein shared by four organisms. The student wants to know which organism is

most closely related to organism A. The student has data that shows the number of amino acid differences between organism A and each of the other organisms. Study the data in the chart. OrganismNumber of Difference in Amino Acid Sequence from Organism A B3 C5 D1 Which organism does this data suggest is most closely related to organism A?
Biology
1 answer:
MariettaO [177]2 years ago
5 0

Answer:

Organism D.

Explanation:

Amino acids are the monomers of proteins and are linked together by the peptide bond. The protein is obtained from the RNA molecules by the process known as translation.

The amino acid sequence of the proteins can also be used to study the evolutionary relationship between the organisms and the closeness of teh organisms with each other. In the question it is give that organisms A and D has least difference ( 1 amino acid sequence difference) and more related with each other.

Thus, the answer is organism D.

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What is the purpose of atp in both cellular respiration and photosynthesis?
Stells [14]

Answer:

Aids energy transfer from a molecule to another

Explanation:

ATP aids energy coupling, combining exergonic reactions to endergonic reactions. In PHOTOSYNTHESIS, ATP is produced in the light reactions for Calvin cycle to produce sugar. In CELLULAR RESPIRATION, sugar undergoes oxidized to produce ATP needed to energize cellular metabolism (ATP is the energy currency of the cell).

ATP is a major source of energy for each and every biological process. In PHOTOSYNTHESIS energy is changed to ATP in the light-dependent phase which is used for synthesis in the dark phase.

ATP is a needed in RESPIRATION. ATP is the energy currency of the cells, sometimes called the “molecular currency” of energy distribution.

6 0
2 years ago
If a neurotransmitter attaches to a ligand-gated channel and creates a potential that causes the inside of the excitable cell me
leva [86]

Answer:

If a neurotransmitter attaches to a ligand-gated channel and creates a potential that causes the inside of the excitable cell membrane to become less negative, and this potential travels only a short distance before dying out, it is considered to be a <u>Graded or local potential</u>

Explanation:

<em>Graded potentials, also known as local or generator, are generated by an excitatory neurotranmitter, usually a ligan gated channel</em>, they occur at a localized place on the cell and their potentials are smaller (from 1-50mV) and its magnitude depends on the strength of the stimulus.

I hope you find this information useful and interesting! Good luck!

5 0
2 years ago
What is the definition of antigen
SIZIF [17.4K]
A toxin or other foreign substance which induces an immune response in the body, especially the production of antibodies.
7 0
3 years ago
Match the following.
dimaraw [331]

Answer:

1) Organisms in this level are either unicellular or colonial (Cellular level).

2) Organisms that live in a group called a colony (Colonial).

3) The work being divided up into specialized tasks (Division of labor).

4) A very long, contracting cell (Fiber).

5) A group of tissues working together as a unit (Organ).

6) A degree of organism complexity. Organisms at this level have their cells arranged into organs (Organ level).

7) The highest level of complexity of a living thing (Organism level).

8) The limiting of the function of a cell to a specific function muscle (Specialization).

9) A group of organs working together for a common purpose (System).

10) Organisms at this level have their cells arranged into systems (System level).

11) Cells working together to perform a particular task division of labor (Tissue).

12) Organisms at this level have their cells arranged into tissues (Tissue level).

8 0
3 years ago
The minimum amount of energy needed to start a chemical reaction is known as:
nadya68 [22]

Answer:

The correct option is B. Activation energy

Explanation:

The activation energy is usually used to designate the minimum energy necessary for a given chemical reaction to occur, that is, the basic requirement for the reaction to proceed.

For a reaction to occur between two molecules, they must collide in the correct orientation and have a minimum amount of energy. As the molecules approach, their electron clouds are rejected. This requires energy (activation energy) and comes from the heat of the system, that, is, from translational, vibrational energy, etc of each molecule. If the energy is sufficient, the repulsion is overcome and the molecules are close enough for a rearrangement of the bonds of the molecules.

The concept of Activation energy was introduced by Arrhenius in 1889. Arrhenius suggested that molecules must prossess a minimum amount of energy to react. That energy comes from the kinetic energy of the clliding molecules. Kinetic energy serves to cause reactions, but if the molecules move very slowly, the molecules will only bounce when they collide with other molecules and the reaction does not happen. In order for the molecules to react, they must have a total kinetic energy that is equal to or greater than a certain minimum value of energy called activation energy.

6 0
3 years ago
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