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Art [367]
3 years ago
7

One of the questions early geneticists had to answer was how only four nucleotides can specify placement of 20 amino acids in pr

oteins. Today we know that ________, a sequence of three adjacent nucleotides, determine the insertion of a specific amino acid in a polypeptide chain.
Biology
1 answer:
jenyasd209 [6]3 years ago
6 0

Answer:

<h2>Codon </h2>

Explanation:

The sequence of DNA is transcribed into mRNA, containing the sequence  for protein synthesis, protein is synthesized according to the codons in mRNA.  This sequence of nucleotide on DNA/ RNA is divided into a series of three nucleotide units, and one unit of three nucleotide is  known as codons.

There are overall 64 codons, 61 codons out of 64 codons, codes for overall 20  amino acids, and the remaining three  are stop codons.

These there codon do not code for any amino acid.

And these 61 codons, they  code for total 20 amino acids. So one amino acid can be coded by one or more than one codons.

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Kazeer [188]
D cellular respiration
5 0
3 years ago
СН,ОН
Alekssandra [29.7K]

Answer: I don't have a definitive answer for this question but I do have a helpful explanation.

Explanation: Try to find out what each letter means and organize the elements by how they connect to each other. If you don't know you can research to find a diagram that can help show you how to connect these functional elements. You could try searching how do you find the elements of HOH in a diagram.

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2 years ago
Biology may answer many questions, but it’s main focus is
bezimeni [28]
 Biology answers many questions<span>, </span>but its main focus is<span> how living organisms interact and function.
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6 0
3 years ago
Read 2 more answers
How do the flowers help the tree meet its needs? AFlowers make food for the plant B. Flowers hold the plant in the ground. C. Fl
azamat

Answer:

Answer is option D.

Flowers contain parts for making seeds.

Explanation:

The part of the plant that is responsible for the sexual reproduction in plants is known as flowers. A flower is said to be complete if contains sepals, petals, stamens and pistil. If the flower lacks one or more structures, it is an incomplete flower.

A complete flower consists of a vegetative part and a reproductive part. The vegetative part contains petals (a bright coloured structure that attracts insects and birds) and sepals (a green coloured structure that protects rising buds and is usually found beneath the petals). The reproductive parts include stamen or androecium (male reproductive organ) and pistil (female reproductive organ). A flower may consists of only female parts or only male parts, or both.

Stamen contains two parts - anther, which produce and store the pollens (male gametes) and filament, which support the anther. Pistil contains three parts - stigma, which receives the pollen grains and style that connects stigma and the ovary, and ovary which contains a lot of ovules (female gametes) which forms the seed.  

Flowers reproduce by pollination, a process in which the pollen are transferred to the stigma of another flower. A pollen tube emerges from the pollen grain and grows through the style and reaches an ovule inside the ovary. Then the nucleus of the pollen grain passes through the pollen tube and fuses with the nucleus of the ovule and this process is known as fertilisation. The fertilised ovules become seeds and the ovary transforms into the fruit. The seeds are dispersed through various methods and the embryo inside them will grow into adult plants.

5 0
3 years ago
&amp; Milk wood plants are essential for monarch butterfly survival. The butterflies drink the nectar from milkweed
Sonja [21]

Answer:

Coevolution

Explanation:

There is a symbiotic relationship between them because the plants get pollinated and the butterflies get protection. Their relationship can also be described by the term mutualism.

7 0
3 years ago
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