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vagabundo [1.1K]
2 years ago
5

3

Biology
1 answer:
lakkis [162]2 years ago
7 0
Because they both have a nucleus but both of them do not have a cell wall
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If you were to try and pair a thymine with a cytosine (a non Watson-Crick base pairing), then would you expect to see any stabil
Artyom0805 [142]

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.

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3 years ago
Pea contains only 0.25% phenylethyl alcohol because high concentrations inhibit both gram-positive and gram-negative organisms.
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If the alcohol concentration in PEA agar was increased, it would inhibit both Gram - and Gram + bacteria by breaking down membrane absorbency barrier, tolerating influx of substances that are generally blocked and leakage of cellular potassium. High alcohol concentrations would lead to disruption or halting of DNA synthesis in both Gram + and Gram - bacteria

7 0
3 years ago
During a presentation about evolution a student claims that modern giraffes inherited their long necks from ancestral giraffes t
motikmotik
"Stretching the neck enabled giraffes to reach higher, which gives them an advantage to survive, reproduce, and pass on this trait" is the one sentence among all the choices given in the question that best describes the claim. The correct option among all the options that are given in the question is the second option or option "B".
6 0
3 years ago
Read 2 more answers
Cells have different membrane carbohydrates if they do different ______.
nydimaria [60]
Jobs.... they do different jobs.
8 0
2 years ago
Are there lysosomes in plant cells?
Nata [24]

Lysosomes are organelles that float on the cytoplasm and their main function is to secrete waste out of the cell and digest.

Lysosomes are found in eukaryotic cells and yes, they are present in plant cells.


Hope it helped.


BioTeacher101

5 0
3 years ago
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