Exam 2-Biology

Metabolism is best described as

An increase in which of the following parameters is most important in the evolution of specialized exchange surfaces such as the linings of the lungs or intestines?

What is an organic, non-protein component of an enzyme molecule called?

A chemical reaction that has a positive ΔG is correctly described as

Which of the following statements regarding enzymes is true?

All of the following are true of enzymes except

According to the induced fir hypothesis of enzyme function, which of the following is correct?

A change in a protein's three-dimensional shape or conformation due to disruption of hydrogen bonds, disulphide bridges, and ionic bonds is termed

How does an enzyme catalyze a reaction?

Whenever energy is transformed, there is always an increase in the

A rock rolling down a hill is exhibiting

Which of the following is part of the first law of thermodynamics?

The transfer of free energy from catabolic pathways to anabolic pathways is best called

Most of a eukaryotic cell's genes are found in the

Which of the following is true for exergonic reactions?

Evolution of biological order

The tertiary structure of a protein in the

Which of the following statements is true concerning catabolic pathways?

Which of the following statements is true regarding enzyme cooperativity?

The mechanism in which the end product of a metabolic pathway inhibits an earlier step in the pathway is known as

Molecules capable of interacting must first overcome a thermodynamic barrier known as the reaction's

Which of the following is true regarding catabolic pathways?

Which bonds are created during the formation of the primary structure of a protein?

The structural feature that allows DNA to replicate itself is the

According to the second law of thermodynamics,

ATP generally energizes a cellular process by

Which term most precisely describes the general process of breaking down large molecules into smaller ones?

In an organism, the energy available to do work is called free energy because

Which of the following best describes the relationship between proteins, RNA, DNA, and genes in humans?

The active site of an enzyme is the region that

-Enzyme function is influenced by physical and chemical environment factors such as pH and temperature. -Enzymes may require a nonprotein cofactor or ion for catalysis to take place. -Enzymes increase the rate of chemical reaction by lowering activation energy barriers. THE ANSWER IS ALL OF THE ABOVE.

Zinc, an essential trace element, is presented in the active site of the enzyme carboxypeptidase. The zinc most likely functions as a(n)

Chemical reactions of metabolism within cells are regulated by organic catalysts. What are these catalysts called?

If one strand of a DNA molecule has the sequence of bases ATTGCA, the other complementary strand would have the sequence

all of the following membrane activities require ATP energy except

Ions diffuse across membranes down their

The kinds of molecules that pass through a cell membrane most easily are

One of the functions of cholesterol in animal call membranes is to

All of the following processes take material into calls except

Celery stalks that are immersed in fresh water for several hours become stiff and hard. Similar stalks left in a salt solution become limp and soft. From this we can deduce that the cells of the celery stalks are

Which of the following is a characteristic feature of a carrier protein in a plasma membrane?

Which of the following statements is correct about diffusion?

A cell with an internal concentration of 0.02 molar glucose is placed in a test tube containing 0.02 molar glucose solution. Assuming that glucose is not actively transported into the cell, which of the following terms describes the internal concentration of the cell relative to its environment?

All of the following statements about membrane structure and function are true except?

The movement of a substance across a biological membrane against its concentration gradient with the help of energy input is which of the following?

What membrane-surface molecules are thought to be most important as cells recognize each other?

All of the following are functions of integral membrane proteins except

figure 5.7 shows

WHICH CURVE WAS MOST LIKELY GENERATED FROM ANALYSIS OF AN ENZYME FROM A HUMAN stomach where conditions are strongly acid?

Which of the following terms best describes the reaction?

Which of the following terms best describes the reaction?

Special name for the movement of water across membranes

Examples include food coloring in water and oxygen in our blood

Carrier proteins assist with the diffusion across the membrane

Waste materials stored in the cytoplasm are released from the cell

Food particles are engulfed and ingested by the cell

The cell ingests liquid and/or dissolved solute