100 POINTS!!!! I WILL GIVE BRAINLIEST TO WHO ANSWERS CORRECTLY!!!!!!!!!!!!

Put the steps of the interaction between actin and

Jobisdone [24]

Answer:

Explanation:

The myosin head rotates, causing overlap

with actin.

The myosin head attaches to a binding site

on the actin filament.

The myosin head detaches from one

binding site and reattaches to another.

7 0

2 years ago

Read 2 more answers

Meselson and Stahl used density labeling of DNA to show that DNA replication occurs via a semiconservative mechanism. In their e

cricket20 [7]

Answer:

The organism previously used 15N for replication so all the DNA molecules were of 15N15N type. Then the organism is shifted to a medium where only 14N is available for replication.
According to semi conservative mode of replication, a newly synthesised DNA molecule consists of one new strand and one parental strand. So after the first round of replication, All the 15N strands will synthesise new DNA strands using 14N resulting into intermediate 15N14N DNA molecules. Hence, only one band would be observed (15N14N) above the original 15N15N band since 15N14N has lighter isotope too so it will be lighter than 15N15N molecules and will lie above it.
After second round of replication, 15N strand from 15N14N would synthesise another 14N strand. 14N strand from 15N14N molecules will also synthesise another 14N strand. So now, 50% of the DNA molecules will be of 15N14N intermediate type and 50% of them will be of 14N14N type.Two bands will be observed above the original 15N15N band. One band of 15N14N molecules will be right above it and other band of 14N14N molecules will be even higher because it is the lightest band since it has only the lighter isotope of nitrogen.

8 0

3 years ago

A doctor is studying a disease where the nucleus of a cell does not grow properly. What do you think would happen to the cells'

Drupady [299]

Answer:

The cell would fail to function. It would likely fail to properly replicate DNA properly or transcribe genes.

Explanation:

The nucleus holds the genetic information, the DNA. If the nucleus does not grow properly, the DNA might not fit or be properly organized inside. This would mean DNA replication could not proceed as normal, and the DNA might not even be able to fit inside the nucleus!

The cell would also struggle to properly transcribe the DNA if the nucleus is not fully formed. DNA acts as a template for mRNA transcription, which directs protein synthesis. The cell will very quickly die if there are inaccuracies in protein synthesis due to mRNA not being adequately synthesized.

5 0

2 years ago

Please help me How do water particles in a wave move?

Anton [14]

Water waves are an example of waves that involve a combination of both longitudinal and transverse motions. As a wave travels through the waver, the particles travel in clockwise circles. The radius of the circles decreases as the depth into the water increases. The animation at right shows a water wave travelling from left to right in a region where the depth of the water is greater than the wavelength of the waves. I have identified two particles in orange to show that each particle indeed travels in a clockwise circle as the wave passes.

5 0

1 year ago

Question 12:

Ugo [173]

Hey there!

Number 3, "has more people than ever before" is correct. As there are more people, there is a greater need more resources.

Hope this helped, have a good night!

8 0

2 years ago