Elements And Ions

Question 1

Elements

Answer 1

A chemical element is a chemical substance that cannot be broken down into other substances by chemical reactions

Question 2

Ions

Answer 2

An ion is an atom or group of atoms that has an electric charge

Question 3

Biogenic elements

Answer 3

The elements that are necessary for basic life processes. Biogenic elements include, but are not limited to, carbon, hydrogen, oxygen, nitrogen, sulfur, and phosphorous.

Question 4

Metabolic process

Answer 4

the set of life-sustaining chemical reactions in organisms

Question 5

Cell’s mass

Answer 5

the amount of matter in a cell

Question 6

Consituent

Answer 6

being a part of a whole

Question 7

Photosynthesis

Answer 7

the process by which green plants and certain other organisms transform light energy into chemical energy.

Question 8

Respiratory gases

Answer 8

oxygen (O(2)), nitric oxide (NO), and carbon dioxide (CO(2))-

Question 9

Valence electrons

Answer 9

the electrons in the outermost shell, or energy level, of an atom

Question 10

Covalent bonds

Answer 10

the simultaneous attraction of two nuclei for one or more pairs of electrons

Question 11

Organic molecules

Answer 11

molecules that are made of carbon and hydrogen, and can include other elements.

Question 12

Isotopes

Answer 12

Atoms with the same number of protons but different numbers of neutrons

Question 13

Amino acids

Answer 13

Amino acids, often referred to as the building blocks of proteins, are compounds that play many critical roles in your body.

Question 14

Disulfide

Answer 14

a compound containing two atoms of sulfur combined with an element or radical

Question 15

Nucleic acids

Answer 15

Nucleic acids are large biomolecules that play essential roles in all cells and viruses

Question 16

Nucleotids

Answer 16

Nucleotides are organic molecules composed of a nitrogenous base, a pentose sugar and a phosphate

Question 17

Thyroxine

Answer 17

Main hormone secreted into the bloodstream by the thyroid gland

Question 18

Cretinism

Answer 18

a condition of abnormal mental and physical development resulting from a deficiency of thyroid hormone in fetal or early life

Question 19

Dental enamel

Answer 19

the wear-resistant outer layer of the dental crown

Question 20

Exitability

Answer 20

the ability of a muscle to be stretched or extended.

Question 21

Haemoglobin

Answer 21

a protein containing iron that facilitates the transport of oxygen in red blood cells

Question 22

Redox reactions

Answer 22

a type of chemical reaction that involves a transfer of electrons between two species.