A protist is an organism in the Kingdom Protista. Protists belong to a very large, diverse group of organisms that are all eukaryotic, and most are unicellular. Examples of protists include red algae, amoeba and slime molds.
Protists vary in their movement, and they are separated in locomotion categories of cilia (hair-like projections), flagella (thread-like, whip appendages) and pseudopodia (temporary projections). They also vary in the way they gain energy, as often a single method of acquiring energy is specific to a single protist. The four groups of protist energy are: photosynthetic autotroph, chemosynthetic autotroph, heterotroph by ingestion and heterotroph by absorption.Learn More
The substances making up the sides of the DNA ladder are alternating phosphate groups and deoxyribose sugar molecules. Phosphate groups are inorganic molecules made up of one atom of phosphorus chemically bonded to several oxygen atoms. Deoxyribose is a type of sugar featuring five carbon atoms.Full Answer >
The DNA stored in each human cell has a total length of about 6 feet, according to the Theoretical and Computational Biophysics Group at the University of Illinois. The DNA is stored inside a cell's nucleus so tightly that it only occupies 10 percent of the total cellular volume.Full Answer >
Mutations can be caused by errors during the DNA repairing process or errors during the replication process. They can also be induced. Induced mutations are caused by chemicals, radiation, diseases and genetic manipulation.Full Answer >
The two purines in DNA are adenine and guanine. Within the structure of DNA, purines are paired with complementary pyrimidine bases, forming base pairs that are bonded by hydrogen bonds. These two purines are also found in RNA.Full Answer >