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OleMash [197]
3 years ago
15

1. What are some things you can do with a pure sample of DNA?

Biology
2 answers:
Westkost [7]3 years ago
8 0

Answer:

Check if someone did a crime!

Explanation:

nirvana33 [79]3 years ago
5 0

Answer:

DNA can be used for molecular analyses including PCR, electrophoresis, sequencing, fingerprinting and cloning

Explanation:

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1. Which event describes a change where evolution has happened?
serg [7]
First one is C, second one is B, third one is C
5 0
3 years ago
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
Is the formal charge on n the same or different in these two species?
sweet [91]

frghjklyjuhgtrfhjkljhygtrfhjkljuhygtrfjkljhgtfdsfghjkhgtfrhjkljhgtfrdbghnjmnhbgfdsfbghjnkhygtretfghnjmgtrfhjkljhg

7 0
3 years ago
What is this? i need help and i’m struggling thank you so much <3
Sliva [168]

thats the plasma membrane. its the outside of a cell :)

hope that helped! <3

8 0
3 years ago
Describe the function of each organelle.<br> Endoplasmic reticulum
Svetach [21]

Answer:

Explanation:

nucleus: the center of the cell that contains the genetic material. The nucleus is like the "Brain" of the cell.

ribosome: is a large complex of RNA and proteins. Ribosomes are the cell structures that make protein. They are found in the endoplasmic reticulum.

endoplasmic reticulum: a network of tubular membranes in the cytoplasm. They fold protein molcules in sacs and transport these proteins in vesicles to the golgi apparatus.

Golgi Apparatus: stores and modifies proteins and prepares to transport them to different parts of the cell.

I hope this helps.

4 0
2 years ago
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