Lipid molecules composed of four joined carbon rings, such as cholesterol, are known as ________

Fill in the blank(s) with correct word


steroids

Biology & Microbiology

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The only evolutionary process that leads to adaptive change is:

A. mutation. B. migration. C. natural selection. D. genetic drift. E. All of the answer options are correct.

Biology & Microbiology

Why is nonhomologous end joining (NHEJ) more frequent in eukaryotes?

A. Bacteria replicate frequently and so can use recombination repair to repair most double-strand breaks. B. The period of time between DNA synthesis events is longer so double-strand breaks occurring outside of the period require NHEJ. C. NHEJ is a mutagenic process that is tolerated better in larger genomes. D. Some eukaryotic cell types use NHEJ as a source of gene variation. E. All of the choices given are correct.

Biology & Microbiology

An RNA molecule (for example, rRNA or tRNA) within a cell can fold into complex three-dimensional shapes for which reason?

a. It contains the base uracil rather than thymine. b. It contains the sugar ribose rather than deoxyribose. c. It is double-stranded. d. It is more primitive than DNA. c. It is single-stranded.

Biology & Microbiology

Name two forms of antagonistic coevolution

What will be an ideal response?

Biology & Microbiology