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RSB [31]
3 years ago
8

Why would the cells need multiples of different organelles

Biology
1 answer:
Ivan3 years ago
4 0
Although the vast majority of DNA<span> in most </span>eukaryotes<span> is found in the </span>nucleus<span>, some DNA is present within the </span>mitochondria<span> of animals, plants, and fungi and within the chloroplasts of plants. These organelles are the main cellular sites for ATP formation, during </span>oxidative phosphorylation<span> in mitochondria and </span>photosynthesis<span> in chloroplasts (Chapter 16). Many lines of evidence indicate that mitochondria and chloroplasts evolved from bacteria that were endocytosed into ancestral cells containing a eukaryotic nucleus, forming </span>endosymbionts.<span> Over evolutionary time, most of the bacte-rial genes encoding components of the present-day organelles were transferred to the nucleus. However, mitochondria and chloroplasts in today’s eukaryotes retain circular DNAs encoding proteins essential for organellar function as well as the ribosomal and transfer RNAs required for their </span>translation<span>. Thus eukaryotic cells have multiple genetic systems: a predominant nuclear system and secondary systems with their own DNA in the mitochondria and chloroplasts.</span>
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A ball at rest starts rolling down a hill with a constant acceleration of 3.2 meters/second2. What is the final velocity of the
bogdanovich [222]

Answer:

19.2 meters/second^2 would be the correct answer.

Explanation:

4 0
3 years ago
rabbits can have curly ears or long ears. a homozygous curly-eared rabbit mated with a homozygous long-eared rabbit. all the bab
charle [14.2K]
Long ears have to be dominant:

If this IS true then these would be your 'parents':

L = long ears
l = curly ears

LL x ll

If you cross the homozygous recessive curly eared rabbit (ll) with homozygous dominant long eared rabbit (LL) you would get 100% Ll - all would look long eared.
3 0
3 years ago
Describe how the same signal molecule (i.e., a hormone or neurotransmitter) can induce different types of effects in different c
Leto [7]

Answer:

it Changes according to the receptor.

Explanation:

Every cell has different receptors in the membrane, these receptors are specific, but different receptors can read one signal molecule, according to the receptor, this molecule can activate or inactivate different path ways.

Let me put it this way, if I give the same message to a botanist and a gardener they both are going to read it in different way even knowing it is the same.

6 0
3 years ago
The host range of a virus is determined by A. whether the glycoproteins or capsid proteins on its surface recognize those of the
Marina CMI [18]

Answer:

A. whether the glycoproteins or capsid proteins on its surface recognize those of the host cells.

Explanation:

Virus has different surface proteins that are recognized by the receptors present on its host cell. The range of a virus is determined by the recognition of these proteins by the host cell.

The interaction between the receptor on the host cell and surface proteins on the viral capsid is important for viral genome entry in the host cell and to determine the range of the host cells.

If the surface protein of the virus is not able to bind to the receptor on any cell then the virus can not infect the cell. For example, the HIV virus infects only those cell which have CD4 receptors. So the right answer is A.

4 0
3 years ago
What does the chlorplast do
miss Akunina [59]

Answer:

Explanation:

Chloroplasts are plant cell organelles that convert light energy into relatively stable chemical energy via the photosynthetic process. By doing so, they sustain life on Earth. Chloroplasts also provide diverse metabolic activities for plant cells, including the synthesis of fatty acids, membrane lipids, isoprenoids, tetrapyrroles, starch, and hormones.

5 0
3 years ago
Read 2 more answers
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