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Murljashka [212]
3 years ago
9

RNA polymerase catalyzes the addition of many rNTPs to a growing RNA.

Biology
1 answer:
SIZIF [17.4K]3 years ago
6 0

Answer:

b. Elongation

Explanation:

During the start of the elongation phase of RNA synthesis, the sigma subunit of RNA polymerase of <em>E. coli</em> is released and NusA protein takes its place. This makes the RNA polymerase to move away from the promoter.

During the elongation phase of RNA synthesis, the enzyme DNA dependent RNA polymerase elongates the RNA strand by addition of ribonucleotides to the free 3'-OH end. The process occurs in 5' to 3' direction and the 3'-OH group serves as a nucleophile.  

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Which letter indicates tunnel-like junctions in the lateral membranes of adjacent epithelial cells?
Oliga [24]

Answer;

D) D

(Gap junctions)

Explanation;

Gap junctions are tunnel like junctions that can occur anywhere along the lateral membranes of adjacent cells. They  allow ions and small molecules to pass to one cell to the next for inter-cellular communication.

They function by allowing the exchange of ions, second messengers, and small metabolites between adjacent cells and are formed by two unrelated protein families, the pannexins and connexins.The protein channels that make up gap junctions consist of two connexons. One connexon resides in the membrane of one cell.

7 0
3 years ago
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In the water process what do clouds form as a result of?
nexus9112 [7]

Answer:

Clouds are created when water vapor, an invisible gas, turns into liquid water droplets. These water droplets form on tiny particles, like dust, that are floating in the air. ... That means some of the liquid water in the towel or bowl changed into an invisible gas called water vapor and drifted away into the atmosphere.

6 0
3 years ago
Skeletal muscles are?
Nesterboy [21]

Skeletal muscles are one of the three muscle types they are a form of  striated muscle tissue.

6 0
3 years ago
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A molecule with the formula C18H36O2, would probably exhibit which of the following characteristics?
Mashcka [7]
The answer would be A—the molecular formula given is that of a long-chain, saturated fatty acid, which would be insoluble in water (i.e., hydrophobic).

—————————

B describes carbohydrates, which can function as a storage of energy (e.g., starch or glycogen) or structural components (e.g., cellulose). The three examples just given are polymers of glucose, a monosaccharide; monosaccharide generally have the empirical formula CH2O; this is not the empirical formula of the given molecule (and, in any case, there are too few oxygen atoms for the number of carbon atoms), and so B is incorrect.

C describes an amino acid, likely an α-amino acid, which consist of a central, saturated carbon bonded to amino (—NH2) and carboxyl (—C(=O)OH) functional groups and a variable side chain, which determines the amino acid’s properties. Since the formula of an amino acid must contain nitrogen, which the formula given doesn’t have, the molecule couldn’t be an amino acid, and so C is incorrect.

D describes nucleic acids. Examples include DNA and RNA; nucleic acids and the nucleotide monomers that comprise them contain a nitrogenous base and a phosphate group. The given molecule’s formula has neither nitrogen nor phosphorus, and so cannot represent an amino acid, making D incorrect.
7 0
3 years ago
Which of the following statements is(are) TRUE of pulmonary edema? I. Pulmonary edema may reduce lung compliance II. Pulmonary e
Colt1911 [192]

Answer:

II. Pulmonary edema occurs when interstitial fluid accumulates in tissues of the lung

Explanation:

Pulmonary edema is a condition that occurs when excess  of fluid filled in the numerous air sacs in the lungs, making it difficult to breathe.

Symptoms of pulmonary edema include wheezing, extreme shortness of breath, Cold, clammy skin, feeling of suffocating or drowning , Anxiety,  and restlessness or a sense of apprehension.

Treatment for pulmonary edema depends on the cause and generally include supplemental oxygen and medications.

Hence, the correct option is II. Pulmonary edema occurs when interstitial fluid accumulates in tissues of the lung.

3 0
3 years ago
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