5' and 3' utrs
The 5′ and 3′ untranslated regions, or UTRs, are parts of a mature messenger RNA that flank the protein-coding sequence. They are tran…
Blog
Articles, guides, and pillar pages across our topic clusters.
What is the energy source of cellular respiration
Cellular respiration extracts chemical energy from fuel molecules, especially glucose in many introductory examples. Cells transfer so…
What type of cells are lysosomes found in
Lysosomes are membrane-bound compartments most associated with animal cells and many other eukaryotic cells. They contain enzymes that…
Organelle of photosynthesis
In plants and algae, photosynthesis takes place in chloroplasts. These organelles contain chlorophyll and internal membrane structures…
Newton's inertia
Newton’s first law says an object remains at rest or continues moving at constant velocity unless acted on by a net external force. In…
Compass magnetic field
A compass contains a magnetized needle that can rotate. It tends to align with the local magnetic field, so its marked end points appr…
Empirical scientist
Empirical knowledge is based on observation or measurement. An empirical scientist uses evidence gathered from the world to test ideas…
List of planets from sun
The eight recognized planets in order outward from the Sun are Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune. Plut…
O22- ion name
The ion written O₂²⁻ is called the peroxide ion. It contains two oxygen atoms joined together and has an overall charge of 2−, giving…
Cellular genetics
Cellular genetics studies how genetic information is stored, copied, expressed, and passed on in cells. DNA sequences provide instruct…
First prokaryotic cells
Prokaryotic cells are cells that lack a membrane-enclosed nucleus. Their DNA is located in a region called the nucleoid, and they also…
4d space time
In relativity, spacetime combines three spatial dimensions with one time dimension. An event is specified by where and when it occurs,…
