Answer:
Yes, two hydrogen bonds could form between thymine and cytosine.
Explanation:
Cytosine is a pyrimidine base found in both DNA and RNA, and Thymine is a pyrimidine base found in only DNA. Electronegative Oxygen and Nitrogen atoms with free lone pairs are potential hydrogen bond acceptors. Hydrogen atoms attached to very electronegative atoms like Oxygen and Nitrogen have strong partial positive charge and are potential hydrogen bond donors.
One hydrogen bond could form between the C4 carbonyl group on thymine which is a hydrogen bond acceptor and the C4 amino group on cytosine which is a hydrogen bond donor. Also, another hydrogen bond could be formed between N3 of thymine which is a hydrogen bond donor and the N3 of cytosine that is a hydrogen bond acceptor.
It is important to note that hydrogen bond cannot be formed between them because the C2 carbonyl groups found on both bases are both hydrogen bond acceptors.
Answer:
They cause DNA to replicate. They denature each other. They are molecules made of amino acids that speed up chemical reactions by lowering the activation energy.
Groups with strong fault lines are more <span>likely</span>
the main thing is definitely global warming
increased global temperature (global warming)
what is evidence of this?
Take a look back on the 2020 hurricane season in the gulf, the amount of hurricanes being formed was astronomical! The main reason for this change is a big temperature difference in the oceans/ocean currents
The correct answers are 1, 2 and 4
