The Right Subclavian supplies the Right Brachial Artery (Major Artery of the arm), and Right Carotid Artery (Artery that supplies brain). The Left Subclavian supplies the Left Brachial Artery.
Answer:
Enzymes
Explanation:
Proteins are polymers made up of ammo acids. Enzymes are a category of proteins. They are catalysts. They speed up the rate of a chemical reaction.
Answer:
Rare species of plants can be cloned so they don't go extinct. To do this, stem cells are taken from the <u>meristems</u> of the plant.
Explanation:
Stem cells can be described as cells which are undifferentiated and have a capability to divide into specialized cells. In plants, the stem cells are located in the meristems of the plant. Out of these cells, all the specialized tissues and organs form in a plant.
Cloning is a method to produce identical copies of a gene or an entire organisms. The method of cloning is now being used widely to make organisms that are at the verge of extinction.
Answer:
The myosin filament or more precisely the myosin head can now bind to the actin forming the cross bridges followed by a power stroke during which actin slides over myosin.
Explanation:
The muscle contraction can be explained by sliding filament theory bu Huxley and Huxley. The two muscle proteins which take part in muscle contraction are myosin and actin.
Myosin: It is a hexameric protein. Each monomer is called meromyosin. Each meromyosin has two important parts, a globular head with a short arm and a tail. The head forms cross bridges with the actin filament. Myosin head acts as ATPase enzyme. When ATP binds, head acts as enzyme hydrolyzing the ATP to produce energy. The head also has the site for binding of actin.
Actin filament: It contains three proteins, filamentous actin, tropomyosin and troponin. Filamentous actin contains active site for myosin binding but at rest, tropmyosin covers the myosin binding site. This prevents the cross bridge formation. Tropomyosin are held in place by troponin molecules.
When calcium is available, the binding of calcium to a TpC sub-unit of troponin causes the shifting of tropomyosin-troponin complex. Now actin can attach to myosin head and slide over myosin.
The actin filaments slide over the myosin filament by the the formation of cross bridges and during this process the I-band gets reduced whereas the A band remain the same. The lengths of actin and myosin filaments remain unchanged.
Answer:
- Parents are heterozygous for the trait, and this is how they got a child with no freckles.
- The probability that the two other children will have freckles is 9/16
Explanation:
Due to technical problems, you will find the complete explanation in the attached file.
