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Mama L [17]
3 years ago
6

Organic catalysts are called polysaccharides. True False

Biology
1 answer:
Fynjy0 [20]3 years ago
3 0
False..................
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What specific event triggers the uncovering of the myosin binding site on actin?
Bess [88]
Striated muscles contain repeating sarcomeres of overlapping arrays of long, thin actin and thicker myosin filaments. Myosin filaments contains the myosin heads, which are enzymes that can bind to actin, split and make use of the energy from ATP. When muscle contraction starts, myosin heads bind to actin, change their configuration on actin, liberating the products of ATP hydrolysis and causing slide of the actin and myosin filaments. The action of the proteins troponin and  tropomyosin on the actin filaments regulates vertebrae striated muscle contraction. The release of calcium ions from the sarcoplasmic reticulum is triggered by the nervous stimulation which causes depolarization of muscle membrane. Calcium ions bind to troponin and thus cause or allow the tropomyosin strands on the actin filament to move so that the part of the actin surface where myosin heads need to bind is uncovered. Contraction then occurs and only stops when the sarcoplasmic reticulum pumps calcium out of the muscle interior.

So basically, what triggers the uncovering of the myosin binding site on actin is the calcium ions binding to troponin and changing configuration.
3 0
3 years ago
A remote-controlled helicopter flew 826 meters west at a constant velocity. It flew that
frosja888 [35]

Explanation:

Distance = 826m

time = 70second

velocity = distance/ time

v = 826/70

v = 11.8m/sec

5 0
2 years ago
You are a mosquito and your body cells have 3 pairs of chromosomes, giving you a total (diploid) number of 6 chromosomes. After
jeyben [28]

At the beginning of mitosis, a mosquito cell has six double-stranded chromosomes. This cell will have split into two daughter cells with six chromosomes each at the end of mitosis. Consequently, 6 chromosomes will be provided to each daughter cell (single-stranded).

<h3>What is mitosis?</h3>

One cell divides into two genetically identical daughter cells during the cell duplication process known as mitosis. The cell's chromosomes are duplicated throughout the process of mitosis and then divided equally between the two daughter cells' two new nuclei.

Every chromosome acquires identical copies of the parent cell's DNA thanks to anaphase. At their centromere, the sister chromatids divide in half to form distinct, identical chromosomes.

For more information regarding mitosis, visit:

brainly.com/question/19058180

#SPJ1

5 0
2 years ago
Hawk
DaniilM [7]

Answer:

There is no diagram in this question, however, the question can be answered based on general understanding.

Light energy is converted to chemical energy by PLANTS (GRASS) i.e from the sun to grass

Explanation:

This question is trying to depict a food web or chain of organisms feeding on one another in order to obtain energy. However, in this process, only one organisms amongst the list of organisms is capable of converting LIGHT energy to CHEMICAL ENERGY.

This organism is called a PRODUCER and it is the GRASS (plant). Green plants like the grass in this question are autotrophs i.e. are capable of producing their own food via the process of PHOTOSYNTHESIS. In this process of photosynthesis, plants capture light energy from the sun and convert it to chemical energy stored in sugars.

7 0
2 years ago
Carbon dioxide (CO2) is formed from one carbon atom bonded to two oxygen atoms. Therefore, carbon dioxide is a? A) Compound B) M
scZoUnD [109]
Carbon dioxide (CO2) is formed from one carbon atom bonded to two oxygen atoms. Therefore, carbon dioxide is a compound!
7 0
3 years ago
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