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nirvana33 [79]
3 years ago
5

Which substances contain nitrogen?

Biology
2 answers:
Luda [366]3 years ago
5 0

Answer:

protiens

Explanation:

in protiens in cells have nightogen

Anuta_ua [19.1K]3 years ago
5 0

Answer:

A. Proteins

Explanation:

Urea is a by product of protein digestion.

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What is the illustration an example of? See comments
In-s [12.5K]

Answer:

Hotspot.

Explanation:

hot spots are volcanic regions thought to be fed by underlying mantle that is anomalously hot compared with the surrounding mantle. Their position on the Earth's surface is independent of tectonic plate boundaries.

8 0
3 years ago
Which cell part is a maze of folded membranes where proteins and lipids are produced
Alex17521 [72]
I believe it is the Endoplasmic Reticulum (ER).
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3 years ago
The interaction between which protein and ion initiates muscle coupling?
labwork [276]

Answer:

Troponin and calcium ions.

Explanation:

Troponin is a component of thin filament along with tropomyosin and actin. It is a protein complex to which calcium binds and start the production of muscular force.

Calcium also playing a very important role in muscle contractions, it binds with troponin and helping to move tropomyosin.

When calcium ion attached to troponin, then conformational changes occurs in troponin shape and moves which allow tropomyosin going away from its inhibitory position from the myosin-binding sites on actin. After this, the energized myosin head starts binding to the actin molecules and starts the cross bridge cycle, which helping in shortening the muscle's fiber.

3 0
3 years ago
Which of the following macromolecules enter the nucleus of a eukaryotic cell through pores in the nuclear membrane? a. rRNAb. ri
Lina20 [59]

Answer:option C= mRNA

Explanation:

MACROMOLECULES are large molecules, such as protein, commonly created by the polymerization of smaller sub-units called monomers.

The NUCLEAR PORE is a protein-lined channel in the nuclear envelope. The NUCLEAR PORE regulates the transportation of molecules between the nucleus and the cytoplasm. In eukaryotic cells, the nucleus is separated from the cytoplasm and surrounded by a nuclear envelope.

mRNA is synthesized by DNA during a process known as the TRANSCRIPTION. After the synthesis, the new molecule moves from the nucleus to the cytoplasm. It passes through the nuclear membrane through a NUCLEAR PORE. Then, it will later join with a ribosome, which is just coming together from its two sub-units, one large and one small.

6 0
3 years ago
Word bank: phenotype, genotype, heterozygous, homozygous, traits,
posledela

Answer:

what's this for

Explanation:

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5 0
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