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3 years ago

What is meant by the term “essential” amino acids, what is essential about them? Put in your own words

2 answers:

7 0

Essential amino acids are the ones that your body can’t make on its own. These are ones that come from food and need to be obtained in order to survive. Your body needs these acids because they are like building blocks of proteins and they’re needed for vital processes like building proteins and synthesis of hormones and neurotransmitters.

Hope this helps

sergey [27]3 years ago

5 0

Amino acids make up proteins, and proteins are needed for proper growth in humans. They’re essential because, without them we wouldn’t have the nutrients we need to survive. I hope this helped!

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Which type of cells are considered to be the building block of all multicellular organisms . A: prokaryotic

denis-greek [22]

Answer: D - Eukaryotic

Explanation: Can not be A, B or C

- Prokaryotic cells can not make up multicellular organisms
- Bacterial cells are prokaryotes and unicellular
- Not all multicellular organisms are plants and are therefore not all made of plant cells

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3 years ago

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Describe the chemical components of DNA.

Slav-nsk [51]

DNA is composed of nucleotides, which are composed of three parts:

1. A five carbon carbohydrate (pentose)

Pentose is classified as a monosaccharide (simple carbohydrate), and its molecular formula is represented by $(CH_{2} O)n$ . They are water soluble molecules with sweet taste. Monosaccharides may have from three carbon atoms (trioses) to six (hexoses). In DNA is present pentose (5 carbon atoms)

2. A nitrogenous base

Nitrogenous bases are ring-shaped compounds that contain nitrogen in their molecular structure. They are classified into two groups: purines and pyrimidines

The purine bases are adenine (A) and guanine (G). They are larger and contain more than one ring in their structure,.

The pyrimidines, cytosine (C), uracil (U) and thymine (T), are smaller and composed of a single ring.

3. One or more phosphate groups

A phosphate consists of a trivalent anion that contains one phosphorus atom and four oxygen atoms. Its molecular formula is expressed by $(PO_{4} ^{-3})$ .

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3 years ago

Cladograms (a type of phylogenetic tree) constructed from evidence from molecular systematics are based on similarities in

defon

Answer:

The correct answer is "mutations to homologous genes".

Explanation:

The missing options of this question are:

A) morphology.

B) the pattern of embryological development.

C) biochemical pathways.

D) habitat and lifestyle choices.

E) mutations to homologous genes.

The correct answer is option E) "mutations to homologous genes".

Modern cladograms do not use physical characteristics to establish evolutionary similarities among species. Modern cladograms are constructed from evidence from molecular systematics based on similarities in mutations to homologous genes. The more similar are the homologous genes, the less different their genetic sequences are, and are considered more closely related in their evolutionary tree.

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3 years ago

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solniwko [45]

The question doesn't have choices. It would be better to have one.

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3 years ago

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Which of the following is not a

Nimfa-mama [501]

B because I’m pretty sure only whales and dolphins have blowholes

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2 years ago