Answer: Hydrogen bonds are created between the base pairs in DNA. Adenine pairs with thymine and cytosine pairs with guanine. Adenine and thymine create 2 hydrogen bonds while cytosine and guanine create 3. These bonds are fairly weak so that they can be broken when DNA is replicated (by an enzyme called helicase which unwinds DNA). However despite them being weak they do stabilize DNA's double helix structure as well.
Answer:
d. Lysine
Explanation:
Lysine ,
Since it can not be synthesized by human body so it is essential in humans and must be obtained from diet . Catabolism of lysine takes place through one of several pathways , most common is saccharopine pathway which takes place in liver . The product formed is acetyl-CoA which is converted to pyruvate through ketogenic pathway .
I'd say D but i'm not 100% sure
Answer:
Mitosis it's the Anaphase
when the spindle fibres contract, each chromosome splits at the centromere, and its two chromatids are pulled apart towards opposite ends of the cell. Each chromatids is actually a single stranded chromosome, since DNA replication took place
