A&P Chap 4 review

Which type of reaction releases energy?

A. An exergonic reaction B. A reversible reaction C. An endergonic reaction D. An irreversible reaction A. An exergonic reaction

Choose the correct statement.

A. An organism decays after it dies. This statement illustrates the second law of thermodynamics. B. The total amount of energy in the universe is gradually decreasing. This statement illustrates the first law of thermodynamics. C. Usually, when one form of energy is converted to another, no energy is wasted. D. Potential energy is also known as entropy. A. An organism decays after it dies. This statement illustrates the second law of thermodynamics.

During DNA replication, which nucleotide will bind to an A nucleotide in the original or parental DNA strand?

A. C B. G C. A D. U E. T E. T; During DNA replication, A only binds with T and T only binds with A.

Which protein joins together the Okazaki fragments of DNA in the lagging strand?

A. DNA ligase B. the leading strand C. the replication fork D. RNA E. DNA polymerase A. DNA ligase; DNA ligase joins the Okazaki fragments in the lagging strand, turning it into a continuous strand.

Which of the following builds new strands of DNA?

A. DNA polymerase B. the replication fork C. DNA helicase D. the lagging strand of DNA E. the leading strand of DNA A. DNA polymerase; DNA polymerase is an enzyme that builds new strands of DNA. It does this by adding DNA nucleotides one at a time.

Which statement about DNA replication is FALSE?

A. The lagging strand is made of a series of fragments that must be joined together to make a continuous strand. B. The two strands of original or parental DNA are separated during DNA replication. C. DNA ligase adds nucleotides to the lagging strand. D. Because the two strands of original or parental DNA run in opposite directions, the new strands must be made in different ways. E. DNA polymerase III builds a new strand by adding DNA nucleotides one at a time. C. DNA ligase adds nucleotides to the lagging strand; You're correct! This statement is FALSE. DNA ligase joins the Okazaki fragments in the lagging strand, turning it into a continuous strand. It does not add nucleotides to the lagging strand.

Which statement best describes strand characteristics as it relates to DNA replication?

A. The leading and lagging strands are both built continuously. B. The leading strand is built continuously, and the lagging strand is built in pieces. C. The leading and lagging strands are both built in fragments. D. The lagging strand is built continuously, and the leading strand is built in pieces. B. The leading strand is built continuously, and the lagging strand is built in pieces; This statement is correct! Because strands in a DNA double helix run in opposite directions, the new strands must be made in different ways. The leading strand is built continuously.

An enzyme that catalyzes a hydrolysis reaction would:

A. Transfer electrons from a donor molecule to an oxygen molecule. B. Join two substrates using energy from ATP. C. Subtract a phosphate group. D. Add a water molecule. D. Add a water molecule.

A kinase moves which functional group or molecule?

A. Water B. Hydroxyl C. Phosphate D. Amino C. Phosphate

In a system that includes a ball and a ramp, when would potential energy be greatest?

A. When the ball was at rest at the top of the ramp B. When the ball came to rest at the bottom of the ramp C. When the ball was at its maximal velocity D. When the ball first began to roll down the ramp A. When the ball was at rest at the top of the ramp

Energy is defined as

A. doing tasks that make you tired. B. the capacity to do work. C. using glucose to synthesize ATP. D. the light and heat from the sun. B. the capacity to do work.

When an enzyme is working as fast as it can because its active site is continually refilled with substrate, the condition is referred to as

A. the Ricardo-Mertz phenomenon. B. saturation. C. equilibrium. D. allosteric modulation. E. specificity. B. saturation.

A reversible reaction is one where

A. there are large changes in the net free energy from substrate to product. B. a reaction between products is unlikely due to the high activation energy. C. there is no change in the net free energy from substrate to product. D. there are small changes in the net free energy from substrate to product. D. there are small changes in the net free energy from substrate to product.