Which molecule has a sugar nitrogenous base and phosphate group

Which portion of the cell membrane is responsible for preventing unwanted materials from entering the cell? A. integral protein B. glycoprotein C. lipid bilayer D. cholesterol

The nucleus of an atom contains

Suppose DNA polymerase synthesizes DNA at a rate of 1130 bases per minute in a newly discovered bacteria and that bacteria replicates their chromosome every 40 min. Calculate the total number of nucleotides in the bacterial chromosome.

How does a scientific theory become better accepted overtime

Your hands moved the chromosomes in your models. What part of a cell did your hands represent?

What is the difference between elements compounds and mixtures

ALSUM genes d. sex chromosomes 47. Down syndrome is characterized by having an extra copy of at least a portion of chromosome 21. Which of following methods would quickly identify the disorder? a. Pedigree chart c. meiosis map b. Karyotype d.

For what percentage of time has life existed on earth round to the nearest whole number

What does this similarity at the molecular level in yeast and humans most likely indicate

Which of these activities is not considered to be a marine ecosystem threat? overfishing. ocean pollution. coastal development. ocean alkalinity?