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ad-work [718]
3 years ago
7

At which steps do cells control gene expression?

Biology
1 answer:
tatyana61 [14]3 years ago
5 0

Answer:

b. transcription, translation, and the formation of the final protein

Explanation:

During transcription, exons are spliced together, introns are removed, a 5' guanosine cap is added, and a poly-A tail is added to the other end of the mRNA molecule, which is critical for the expression of a gene. During translation, you see control of gene expression in the form of regulatory proteins that bind to specific sequences or structures within the 5' or 3' UTR, preventing the attachment of ribosomes. Lastly, during formation of the final protein, some amino acids are altered via the addition of certain molecules like sugar or the removal of certain amino acids from the overall polypeptide, otherwise known as cleavage.

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There are several properties of water that make Earth a suitable environment for life, including water's high boiling point and
Trava [24]

Answer: D.) It allows water to resist freezing and thawing cycles.

The ability of the water molecule to absorb and retain heat is called as heat capacity of water, because of this property the temperature of water remains the same for long, irrespective of the external environment. It allows water to resist freezing and thawing cycles because water molecules will resist change in it's temperature. This temperature regulation will prevent instant heating and cooling, hence, will provide suitable environment for the survival of marine organisms.  

3 0
3 years ago
If two trucks have the same mass, but truck A is traveling 15 km/h, and truck B is traveling 30 km/h, what statement is true? Qu
Montano1993 [528]

Given that the two trucks have the same mass but different velocities, that is truck A is traveling 15 km/h and truck B is traveling 30 km/h,  hence  Truck B will have a greater stopping distance.

The reason why Truck B will have a greater stopping distance is because it speed is greater hence more distance to cover.

From the following expression

Speed = Distance/Time

Distance = Speed*Time

More on the kinetic Energy

Following from the given problem truck B will also have more kinetic energy because it velocity is more

Formula

KE= 1/2mv^2

Hence the more the velocity for a constant mass the greater the Kinetic energy

Learn more:

brainly.com/question/20658056

 

6 0
3 years ago
One way that fossils form by the dead organism's soft tissue is ________ by sediments such as sand.
loris [4]
<span>preserved is the answer</span>
8 0
3 years ago
Read 2 more answers
Compared with a eukaryotic cell, a prokaryotic cell Select one:______
juin [17]

Answer:

The correct option is a. lacks organelles beyond ribosomes.

Explanation:

All cells of higher organisms are bounded by a cell membrane (also called plasma membrane or plasmalema) and contain cytoplasm that surrounds one or more nuclei. Within the cytoplasm there are structures known as organelles, which are specialized in carrying out the metabolic processes of the cell, these cells are called eukaryotes. The prokaryotes are smaller, lack a differentiated nucleus and organelles. The prokaryotic cells are not internally divided by membranous walls, but consist of a single space.

Both prokaryotic and eukaryotic cells contain ribosomes. Ribosomes are organelles not delimited by membranes, these organelles are important since a cell makes all its proteins in its ribosomes.

8 0
3 years ago
What were the early plants called?
umka2103 [35]

Explanation:

The oldest fossil evidence of seed plants is of Late Devonian age, and they appear to have evolved out of an earlier group known as the progymnosperms. These early seed plants ranged from trees to small, rambling shrubs; like most early progymnosperms, they were woody plants with fern-like foliage.

4 0
3 years ago
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