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Levart [38]
3 years ago
14

A 2-year-old human's brain is _____ percent of the adult brain's weight. 55 65 75 80

Biology
1 answer:
bija089 [108]3 years ago
3 0
The answer to this question would be 75%

At 2 years old, the human brain is already 75% of adult weight. It will be still growing and at 6 years old age it will become 90% of adult weight. The skull will also grow at the same rate because it has to accommodate a space for the brain to grow. That is why the suture joint of the skull in children is not completely closed.
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QUESTION 1 (5 marks) A molecule of messenger RNA (mRNA) has just been synthesized and processed in the nucleus of human cell wit
Dmitry [639]

1) DNA Template strand: TACAATCGACCCATC. 2) Anticodon: AAU. 3) mRNA carries genetic information to build the protein. 4) 5 amino acids. 5) Amino acids: Met, Leu, Ala, Gly, Tyr.

1)

<h3>What is the template strand?</h3>

When the DNI molecule separates into two strands to form the transcription bubble, we can identify two separate segments:

  • The coding strand that goes in 5' to 3' direction
  • The complementary strand -template strand- that grows in 3' to 5' direction .

The template strand is the one that is going to be complemented by the mRNA.

mRNA ⇒ AUGUUAGCUGGGUAG

  DNA ⇒ TACAATCGACCCATC

Remember that pairs are as follows

<u>DNA    RNA</u>

T     →    A

A     →    U

G     →    C

<u>C     →    G   </u>

2)

<h3>What is an anticodon?</h3>

The anticodon is the sequence of three nucleotides that couples with the mRNA codon.

Each tRNA has two important sites. One of them is the anticodon that couples with the codon of the mRNA molecule. The other one carries the amino acid that is going to be addeded to the protein.

                              1st      2nd     3th     4th   5th

mRNA codons ⇒ AUG   UUA   GCU  GGG  UAG

tRNA anticodon ⇒         AAU

3)

<h3>What is translation?</h3>

Translation is the stage of protein synthesis during which mRNA carries genetic information needed to synthesize the new protein in the cytoplasm.

Steps,

1- The formed mRNA moves to the cytoplasm through the nucleus membrane pores.

2- Once in the cytoplasm, mRNA meets a ribosome, the primary structure for protein synthesis.

3- Ribosomes are organelles composed of the association of proteins with rRNA and tRNA. They can be found in the rough endoplasmic reticulum or floating in the cytosol.

4- While the ribosome reads mRNA strain from its 5' extreme to 3', tRNA adds the correct amino acids to build the polypeptide.

The function of mRNA during translation is to take genetic information needed to build the protein.

4)

<h3>How many amino acids are determined per codon?</h3>

Each codon codes for only one amino acid.

There are cases in which different codons code for the same amino acid, but a single codon always codes for one amino acid.

mRNA codons ⇒ AUG   UUA   GCU  GGG  UAG

Amino acids     ⇒ Met    Leu     Ala     Gly    Tyr

                                 1        2         3        4        5

This mRNA segment represents 5 amino acids.

5)

Amino acids     ⇒ Met    Leu     Ala     Gly    Tyr

You can learn more about translation at

brainly.com/question/16305501

brainly.com/question/25017567

#SPJ1

3 0
1 year ago
The salamander is an amphibian, so it has a ____ as it grows and develops. The adult form is different from the larva because th
UNO [17]

<span>The answer is A……A. Salamanders have a larvae stage that breaths through gills while the adults breaths through lungs.  The larvae stage develops 30 days after hatching and may metamorphose into an adult (60 days from hatching) ore remain as larvae to maturity. </span>

3 0
3 years ago
Read 2 more answers
Describe the functions and properties of one or two of the macromolecules: proteins, carbohydrates, lipids, or nucleic acids. wh
Sophie [7]
Lipids, also known as fats, play multiple roles in the body. Fats are broken down in the digestive tract to form individual fatty acids and cholesterol molecules. <span>Carbohydrates are the preferred source of energy for most of the tissues in the body, including the nervous system and the heart</span>
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3 years ago
Which is inversely proportional to weight on a plant's surfaces?
Oksana_A [137]

Answer:

The weight of an object at the surface of a planet is proportional to the planet's mass and inversely proportional to the square of the radius of the planet.

5 0
3 years ago
What is one of the root causes of environmental problems?
Goryan [66]

Answer:

here are some:

1) market failure, 2) the tragedy of the commons, and 3) the underprovisioning of public goods. One of the first principles of free markets is that for them to work effec- tively, the full costs of an activity must be borne by the involved parties.

Explanation:

hope this helps <3

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2 years ago
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