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Marizza181 [45]
3 years ago
14

The signal for apoptosis can come from outside or inside the cell. Give one example when the signal comes from outside the cell

and two examples of cellular occurrences that would prompt an apoptosis signal from inside the cell.
Biology
1 answer:
Svetach [21]3 years ago
5 0

Answer:

- A signal for apoptosis that comes from outside the cell is when a cell detaches from extracellular matrix. If this happens, a transmembrane signal is triggered.

- Two examples of cellular occurrences that would prompt an apoptosis signal from inside the cell are:

1. Damaged DNA

2. Increase of cytosolic calcium concentration

Explanation:

Apoptosis can be activated from an intrinsic or an extrinsic pathway. The intrinsic pathway is activated when a cell senses stress (for example, damaged DNA or high cytosolic calcium concentration) and triggers death proteins to activate apoptosis mechanism inside of it; the extrinsic pathway refers to the apoptosis triggered by signals that come from other cells. In this scenario, ligands bind to cell-surface death receptors and activates a death-inducing signal.

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Which statement describes an important role of carbon dioxide in Earth's atmosphere?
MrRissso [65]

Answer:Plants use carbon dioxide to make food

Explanation: Carbon-dioxide plays a very important role in sustaining life on Earth.

Plants use carbon-dioxide and water for photosynthesis in presence of sunlight and chlorophyll to produce food and oxygen.

CO₂ + H₂O →  O₂ + glucose (food)

This food is consumed by the animals and oxygen is used for respiration. Animals use energy from the food to do work and exhale back carbon-dioxide.

5 0
2 years ago
Read 2 more answers
If one strand of a DNA molecule has the sequence of bases 5′-ATTGCA-3′, the mRNA synthesized following the template will be ____
rjkz [21]

If one strand of a DNA molecule has the sequence of bases 5-ATTGCA-3, the mRNA synthesized following the template will be 3-UAACGU-5.

Nucleotides are added to the growing strand one at a time in the precise sequence dictated by the existing  template strand. adenine and thymine are always paired with each other in the Watson-Crick DNA model, and cytosine is always paired with guanine.

The nucleotide sequence of DNA serves as a template for the nucleus, where mRNA is synthesised. The RNA polymerase II enzyme is responsible for this reaction's catalysis and needs nucleotide triphosphates as its substrates. Transcription is what happens in the nucleus when DNA is converted into mRNA. The cytoplasmic synthesis of proteins is controlled by the mRNA. The cytoplasm is where the mRNA that is produced in the nucleus attaches to the ribosomes after being transported from the nucleus. The nucleotide sequence of the mRNA serves as a guide for the assembly of proteins on ribosomes. The cytoplasm receives a "message" from the nucleus via mRNA. The nucleotide sequence of the mRNA, which is complementary to the nucleotide sequence of the messenger RNA, encodes the message.

To learn more click on the link below

brainly.com/question/15095679

#SPJ4

4 0
1 year ago
Name the four things that can happen to move carbon from a plant and return it to the atmosphere
kvv77 [185]

1. Respiration-process by which plants release CO, while they break down the sugar

2. Animals eat plants- They break down sugars and starches by a process of metabolism and the products are energy water, and CO2 molecules.

3. Decomposition-when plants die, their parts (wood, leaves) decay bringing the carbon into the ground

4. Root respiration- respiration that occurs in roots, adds to soil respiration (the amount of CO2 produced through root respiration is determined by the root biomass ).

5 0
2 years ago
PLEASE HELP!!!!!!!!!!!!!!!!!!!!!!!!!!!!
dezoksy [38]

Answer: it is B

Explanation:

8 0
3 years ago
What are the three reasons that organisms react?
Firlakuza [10]
Competition, predation, cooperation, symbiosis
between same and different kinds of organisms, competes for avalible resources (food, light)
between different kinds of organisms, hunst and kills eachother in order to supply their energy (shelter)
between same organisms, lives together and helps eachother out (mates)
between different kinds or organisms, lives in close association wiht another kin of organism (space/territory)
all non-living things in an ecosystem are interconnected and changing even one thing impacts the whole ecosystem
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