I think it’s all of them! Tell me if I’m right or wrong pls
<span>When two amino acids combine and the carboxyl group of the first amino acid reacts with the amino group of the second amino acid, the end product of this combination is <span>A di-peptide and water.
</span></span><span>The linking of two amino acids is accompanied by the loss of a water molecule.
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Pls. see attachment for the image of the peptide-bond formation.
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<span>The answer is cell wall. It is the rigid outer layer
of plant cells that is composed of subunits of cellulose molecules,
pectin, lignin, or hemicellulose. It enables
the plant to withstand turgor pressure,
without bursting, required to give them support.</span>
Answer:
d. mucosa, submucosa, muscularis, serosa
Explanation:
The layers of the digestive tract starting from the lumen are mucosa, submucosa, muscularis and serosa.
- The first layer is mucosa which is made of epithelium cells and helps in absorption of nutrients from digested food. It has numerous villi structure which increase the surface area for absorption.
- Second layer submucosa supports mucosa and is supplied with large blood vessels, nerves and lymphatics. Absorbed nutrients enter the blood vessels which are present in submucosa.
- The third layer muscularis functions to create peristaltic movements in GI tract. Muscles in this layer make the food move and mix with digestive juices.
- Final layer serosa works to reduce friction between digestive tract muscles. It has a thin cell layer which secretes serous fluid that acts as a lubricant.
I think the correct answer from the choices listed above is option C. The substitution, addition, or removal of a single nucleotide in DNA is called a point mutation. It is a type of mutation that affects only one or very few nucleotides in a gene sequence.