Energy is stored in the covalent bonds between phosphates, with the greatest amount of energy (approximately 7 kcal/mole) in the bond between the second and third phosphate groups. This covalent bond is known as a pyrophosphate bond. An analogy between ATP and rechargeable batteries is appropriate. What molecule is energyRead More →
Water molecules stick to other water molecules. This property is called cohesion. … Hydrogen bonds form between adjacent water molecules because the positive charged hydrogen end of one water molecule attracts the negative charged oxygen end of another water molecule. How many water molecules can bind together? Water molecule canRead More →
NADPH and ATP are produced. NADPH and ATP are used. Oxygen gas is released. Water is split. What is the splitting of water molecules called? You will find out that water is made up of hydrogen and oxygen atoms, and that we can split the atoms in a water moleculeRead More →
All elements are made up of atoms. ➢ Atoms are made up of protons, neutrons, and electrons. Two different kinds of atoms can combine to form a compound. A molecule is a combination of atoms that cannot be broken apart while still retaining the same properties as the larger substanceRead More →
A water molecule consists of two atoms of hydrogen linked by covalent bonds to the same atom of oxygen. Atoms of oxygen are electronegative and attract the shared electrons in their covalent bonds. What holds water molecules together? Strong linkages—called covalent bonds—hold together the hydrogen (white) and oxygen (red) atomsRead More →
Carbohydrates are used by the body for energy and structural support in cell walls of plants and exoskeletons of insects and crustaceans. They are made of smaller subunits called monosaccharides. Monosaccharides have carbon, hydrogen, and oxygen in a 1:2:1 ratio. What is the chain of subunits called? Most macromolecules areRead More →
Lipid-soluble molecules can readily pass through a lipid bilayer. Examples include gas molecules such as oxygen (O2) and carbon dioxide (CO2), steroid molecules, and fat-soluble vitamins (A, D, E, and K). What can cross the phospholipid bilayer? Only small uncharged molecules can diffuse freely through phospholipid bilayers (Figure 2.49). SmallRead More →
Yes Elena, you are correct. Isoenzymes are just different forms of the same enzyme activity. However, they are seen in different proportions in varying tissues. They actually have different amino acid composition and sequence (hence making A false). How are the common names of enzymes often derived? An enzyme’s nameRead More →
There are 7 diatomic molecular elements on the periodic table. When they are in the elemental state (all by themselves, not tied up in a compound) they must have a subscript 2 behind them. Each molecule is made of two atoms of the substance. Is a diatomic molecule a compound?Read More →
The plastic bag represents the cell membrane of a cell. 2.) What color was the starch at the start of the experiment? The starch was white at the beginning of the experiment. Is the sandwich bag permeable to starch? The sandwich bag is semi-permeable which allowed for certain molecules toRead More →