Cytosine is a

A) Purine

B) Pyrimidine

C) Sugar

D) Protein

Gene regulation in eukaryotes is regulated by

How does gel electrophoresis work?

The cabins of airplanes are pressurized and temperatures is internally controlled. Why are all planes constructed this way and what would happen if theses systems failed?

in a simulation of genetics a child inherits either a dominant or recessive allele from each parent which of the following would be the best method for randomly determining which of two possible alleles a child inherits from the father

Describe types of stem cells in adults!

Which of the following is an example of an X-linked recessive disorder?. A. Methemoglobinemia. B. Sickle cell disease. C. Huntington disease. D. Color blindness

A fertilized grasshoper egg has 24 chromosomes how many chromosomes does a adalt grasshoper have?

List five proteins of the myofilaments and describe their physical arrangement

Lucia ran a 5k on a hot afternoon. a few hours later, the muscles in her legs began to spasm painfully. what condition was lucia most likely experiencing?

Which of the following most significantly determines a community's access to potable water? a. access to clean raw water sources b. the availability of money c. local drought conditions d. the level of industrial development