HW 2

The number of ATP molecules produced during the anaerobic phase of cellular respiration is

2

O = O is the structural formula for the oxygen molecule. How many electrons in total are being shared between the two oxygen atoms?

4

There are two chemical differences between DNA and RNA. The first is that DNA uses the sugar deoxyribose and RNA uses the sugar ribose. The second is...

DNA has the nitrogenous base, thymine, while RNA uses uracil instead

The different types of RNA molecules are examples of nucleic acids that have a double helix shape.

False

Smaller organic molecules such as glucose or amino acids can be combined into larger macromolecules. What do we call the smaller molecules from which the macromolecules are built?

Monomers

In terms of percentage of body mass, what is the most abundant chemical element in the body?

Oxygen

The type of lipid that is both polar and non polar is

Phospholipids

Each element has a unique identifying number called the atomic number. Which of the following subatomic particles is(are) represented by the atomic number?

Protons

ATP is a compound used by the body to store chemical energy harvested from other metabolic processes, such as the breakdown of nutrients. This energy can be released to fuel other process, such as the synthesis of other molecules. The usual way in which energy is released from ATP is by the hydrolysis of the last phosphate group in a chain of three phosphates.

True

The monomer unit of a protein contains

a centrally located carbon an R side chain that gives specificity an acidic carboxyl group an amino group all of these choices

Which is not true about pH?

a solution with a pH of 9 is acidic

Saturated fats are composed of

chains of single-bonded carbon atoms

Proteins folded into pleated sheets or twisted into a helix(spiral) are considered to be _____ structure proteins.

glycogen

Which of the following molecules is a polymer of a smaller carbohydrate unit?

glycogen

In the cell, enzymes are...

highly efficient in causing many reactions, sometimes thousands, to occur per second very specific in that each enzyme will only cause one specific reaction to occur an excellent form of control because the activity of an enzyme can speed up or slow down the rate of chemical reactions occurring. all choices are correct

_____ is the process of an atom giving up or gaining one or more electrons through its interactions with other atoms

ionization

Of the major types of organic compounds found in the body, which type is used to make enzymes, to make structural molecules such as collagen, and nearly always has complex, 3-dimensional structures?

proteins

Proteins folded into pleated sheets or twisted into a helix(spiral) are considered to be _____ structure proteins.

seecondary

Blood is a complex body fluid. If a vial of blood is drawn for a blood test and is allowed to sit in a rack for some time, the red blood cells will settle out and drift to the bottom of the tube. This process indicates that at least as far as the blood cells are concerned, blood has the properties of what type of fluid?

suspension

What typically happens to a protein if it becomes overheated?

the protein denatures

Which is not true about carbohydrates?

they have mostly ionic bonds