BIO TEST

Anabolism is the set of metabolic, pathway that consult molecucles from smaller units. These reactions require energy. The synthesis of protien or carbohydrates polymers always produces which of following as a byproduct of these synthesis reactions?

ATP

The chemical structure for the nitrogenous base adenine is adenine is shown above. It is an important biomolecules and is found in which three of the following?

ATP, DNA, and RNA

Which of the following best describes the portion of the curve labeled B?

Activation energy of the enzyme-catalyzed reaction

Proteins are polyners composed of monomers called amino acids. Which of the following pairs of functional groups characterizes the structure of an amino acid?

Carboxyl and amino group

Alcohol dehydrogenase (ADH) is an enzyme that aids in the decomposition of ethyl alcohol into nontoxic substances. Methyl alcohol acts as a competitive inhibitor of ethyl alcohol by competing for the same active site on ADH. When attracted to ADH, methyl alcohol is converted to formaldehyde, which is toxic to the body.

Competitive inhibition will decrease because the proportion of the active sites occupied by the substrate will decrease.

The CFTR protein is made up of 1,480 amino acids linked together in a chain. Some humans produce a version of the CFTR protein in which phenylalanine (an amino acid) has been deleted from position 508 of the amino acid chain.Which of the following best predicts how the amino acid deletion will affect the structure of the CFTR protein?

It will affect the primary, secondary, and tertiary structures of the CFTR protein.

Which of the following statements regarding crayfish digestion is most consistent with the data?

Little digestion occurs in the stomach.

Within complex biological systems, many chemical reactions that, by themselves, require energy input can occur because the reactions

May be coupled to the hydrolysis of ATP

According to the data, which of the following can correctly be concluded about crayfish?

Most digestive enzymes are found in the digestive gland.

According to the data, which of the following can best be concluded from a comparison of the results of preparation II with those of preparation I?

Most of the increase in the amount of product in preparation I was due to an enzymatic degradation of the substrate.

According to the data, the absorbance fails to increase significantly after 10 minutes in preparation III. This is most likely explained by which of the following?

Most of the substrate was digested during the first 10 minutes.

Both organic and inorganic chemical reactions can be affected by the addition of a catalyst. Which of the following can be used to determine the rate of enzyme-catalyzed reactions?

Rate of disappearance of the substrate

Biomolecules have intramolecular forces that hold them together as a unit. Biomolecules also exhibit intermolecular forces when interacting with other biomolecules. Which of the following is an example of hydrogen bond?

The attraction between a hydrogen of one water molecule and the oxygen of another water molecule

Which of the following statements is best supported by the data?

The enzymatic activity is independent of pH.

Which of the following best describes the portion of the curve labeled E?

Total G of the enzyme-catalyzed reaction

Which of the following best describes how amino acids affect the tertiary structure of a protein?

Which of the following best describes how amino acids affect the tertiary structure of a protein? The interactions of the different R -groups with other R -groups and with their environment determine the tertiary structure of the protein.

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