Chemistry Of Life

Question 1

Is a trace element an essential element?

Answer 1

Yes. Organisms require trace elements even though only very small quantities are needed.

Question 2

A lithium atom has three protons and 14 neutrons what is its mass number? 

Answer 2

7 amu

Question 3

Is two, a more elements are in the same road what do they have in common? If two or more elements are in the same column what do they have in common?

Answer 3

The elements that are in the same row are known to have the same number of electron shells. Elements that are in the same column or ones that have the same number of electrons in their valence shells.

Question 4

What does electronegativity and how does it affect interactions between water molecules?

Answer 4

Hydrogen bonds form between the positive partial charge of the two hydrogen atoms and negatively charged oxygen atoms of the other water molecules. This causes water, molecules enter stick together.

Question 5

Describe the properties of water contribute to the upward movement of water in a tree?

Answer 5

1. Osmosis is the movement of water from an area of high concentration to low concentration. This means that because there is more water in the roots of the tree than in the upper parts water will flow upwards.
2. Hydrogen bonding and capillary action: hydrogen bonding results from slightly positive hydrogen, atoms and the slightly negative oxygen atoms. This means that a strong bond with a car with the water molecules as some water moves out the tree more. Will continue with it.

Question 6

Compare the structure of fat (triglyceride) with that of a phospholipid

Answer 6

A phospholipid has a head group attached to the glycerol in place of a third fatty acid, which is present at the same spot on glycerol in a triglyceride

Question 7

Why are human sex hormones considered lipids?

Answer 7

Human sex hormones are steroid lipids since they have hydrophobic biological molecules

Question 8

What parts of a polypeptide participate in the bonds that hold together secondary structure? Tertiary structure?

Answer 8

Secondary structures are held together by hydrogen bonds along the polypeptide backbone.
Tertiary structures are held together by interactions of our groups from various amino acids are both covalent and noncovalent interactions