Answer:
have curved protofilaments at their plus ends
Explanation:
Microtubules are polymers of tubulin proteins that function as the cytoskeleton of eukaryotic cells. Microtubules are dynamic structures that can grow and shrink at a rapid rate. During this process, tubulin subunits can associate and dissociate at the plus end of the protofilament. Tubulin subunits bind to two GTP molecules, one of which is hydrolyzed to GDP after assembly. When microtubules are unstable, protofilaments curl outwards because GDP-bound tubulin has a weak affinity (thereby curving it) and disassemble. The dynamic stability of microtubules is regulated by a feedback loop: when microtubules shrink, free tubulin concentration increases and microtubules start to grow. As microtubules grow, free tubulin concentration decreases and the rate of GTP-tubulin addition also decreases.
Answer:
This is the spring tide: the highest (and lowest) tide. Spring tides are not named for the season. This is spring in the sense of jump, burst forth, rise. So spring tides bring the most extreme high and low tides every month, and they always happen – every month – around full and new moon.
Explanation:
Answer:
Cellulose is the main substance found in plant cell walls and helps the plant to remain stiff and strong
Explanation:
Evaporation
Explanation:
On a hot sunny day, the stage of water cycle most likely occurring is the evaporation stage.
At this stage, a phase change is occurring and liquid water is converted to water vapor in the atmosphere.
- Evaporation is an important aspect of the water cycle.
- It is preceded by precipitation and followed by condensation in the atmosphere.
- Water rises from the surface in gaseous forms and condenses in the atmosphere.
- This is because it is less dense than the surrounding atmosphere.
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Phase change brainly.com/question/1875234
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