Answer:
D. Yes, two hydrogen bonds could form between thymine and cytosine.
Explanation:
A hydrogen bond (often informally abbreviated H -bond) is a primarily electrostatic force of attraction between a hydrogen (H) atom which is covalently bound to a more electronegative atom or group, particularly the second-row elements nitrogen (N), oxygen (O), or fluorine (F)—the hydrogen bond donor (Dn)—and another electronegative atom bearing a lone pair of electrons—the hydrogen bond acceptor (Ac).
The formation of stable hydrogen bonds depends on the distance between two strands, the size of the bases and geometry of each base. Stable pairings occur between guanine and cytosine and between adenine and thymine (or adenine and uracil in RNA).
One hydrogen bond could form between the C4 carbonyl group on thymine (a hydrogen bond acceptor) and the C4 amino group on cytosine (a hydrogen bond donor). Another hydrogen bond could form between N3 of thymine (a hydrogen bond donor) and the N3 of cytosine (a hydrogen bond acceptor). Note that the C2 carbonyl groups found on both bases are both hydrogen bond acceptors and therefore a hydrogen bond cannot be formed between them.
Answer:
no...... not at all..................
That would be.... Very bad. That pretty much means that unless this specific person was hooked up to a artificial heart and lung machine, or a VAD (Ventricular assistance device, which even then would most likely be useless), they are dead. Their heart has so much dead tissue that your heart wouldn't be able to effectively pump in the slightest. Also Cardiac tissue does jot heal or grow back, that tissue is all you get. This would mean the patient needs a heart transplant.
Hello There! ^_^
Your question: As an infant, the ability to produce antibodies is..?
Your answer: As an infant, the ability to produce antibodies is limited.
The answer is option C.
Happy Studying!
A negative symptom of schizophrenia is_______.
A. hallucinations
