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beks73 [17]
3 years ago
7

How to remember the different prokaryotic and eukaryotic

Biology
1 answer:
stiv31 [10]3 years ago
3 0

Prokaryotic: has no nucleus, has no mitochondria.

Eukaryotic: Has a nucleus, contain membrane bound organelles and divide through mitosis and meiosis

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All the information needed to make an entire organism is in a molecule called
Alex787 [66]

Small sections of DNA, called genes, code for the RNA and protein molecules required by the organism. In eukaryotes, each cell's genome is contained within a membrane-bound structure called the nucleus. Prokaryotes, which contain no inner membranes, store their genome in a region of the cytoplasm called the nucleoid.

i hope this helped, have a nice day! (o:

5 0
3 years ago
Physical differences between the cranium of the gorilla, Australopithecus, and modern human. What does this difference tell you
Lilit [14]
The gorilla and Australopithecus have a more defined pushed out face feature unlike the modern human who evolved to have a more rounded face. The cranium for the gorilla and Australopithecus happen to be more sunken in unlike the rounded human face. This tells us that the Australopithecus most likely evolved from the gorilla. This also tells us that they lived in different environments because of their different evolutions. 
7 0
3 years ago
Why are a variety of instruments needed to measure change in the climate system?
maksim [4K]

Answer:

The answer is B.

6 0
3 years ago
If a DNA strand has 32 % guanine, what percent thymine does it contain?
Alex_Xolod [135]

Answer:

B

Explanation:

Guanine and Cytosine pair together. So, if 32 percent is guanine, then 32 percent should also be cytosine. This is a total of 64 percent. The remaining 36 percent is split between thymine and adenine. So, Thymine will have half of 36 percent which is 18 percent.

3 0
2 years ago
Which would probably have the greatest effect on a protein's function—a change to the primary, secondary, or tertiary structure?
Alja [10]

Answer:

There are 20 different standard L-α-amino acids used by cells for protein construction. Amino acids, as their name indicates, contain both a basic amino group and an acidic carboxyl group. This difunctionality allows the individual amino acids to join in long chains by forming peptide bonds: amide bonds between the -NH2 of one amino acid and the -COOH of another. Sequences with fewer than 50 amino acids are generally referred to as peptides, while the terms, protein and polypeptide, are used for longer sequences. A protein can be made up of one or more polypeptide molecules. The end of the peptide or protein sequence with a free carboxyl group is called the carboxy-terminus or C-terminus. The terms, amino-terminus and N-terminus, describe the end of the sequence with a free α-amino group.

The amino acids differ in structure by the substituent on their side chains. These side chains confer different chemical, physical, and structural properties to the final peptide or protein. The structures of the 20 amino acids commonly found in proteins are shown in Figure 1. Each amino acid has both a one-letter and three-letter abbreviation. These abbreviations are commonly used to simplify the written sequence of a peptide or protein.

figure1-Protein-Structure

Depending on the side-chain substituent, an amino acid can be classified as being acidic, basic or neutral. Although 20 amino acids are required for synthesis of various proteins found in humans, we can synthesize only ten. The remaining 10 are called essential amino acids and must be obtained in the diet.

The amino acid sequence of a protein is encoded in DNA. Proteins are synthesized by a series of steps called transcription (the use of a DNA strand to make a complimentary messenger RNA strand – mRNA) and translation (the mRNA sequence is used as a template to guide the synthesis of the chain of amino acids which make up the protein). Often, post-translational modifications, such as glycosylation or phosphorylation, occur which are necessary for the biological function of the protein. While the amino acid sequence makes up the primary structure of the protein, the chemical/biological properties of the protein are very much dependent on the three-dimensional or tertiary structure.

5 0
3 years ago
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