Biology EOC Flashcard 3

Front

What phase of the cell cycle is DNA replicated?

Back

During the S phase.

Front

What do all organisms have in common regarding genetic code?

Back

All organisms have the same components that make up the genetic code.

Front

What is the primary activity of a cell during most of the cell cycle?

Back

The cell spends most of its time growing.

Front

What does the intersection of the left, top, and right nitrogenous bases indicate?

Back

It indicates which amino acid a mRNA codon represents.

Front

What is the significance of the S phase in the cell cycle?

Back

It is the phase where DNA replication occurs.

Front

What are the main stages of the cell cycle?

Back

The main stages are G1 (growth), S (synthesis), G2 (growth), and M (mitosis).

Front

What is the role of mRNA in protein synthesis?

Back

mRNA carries the genetic information from DNA to the ribosome, where proteins are synthesized.

Front

What are nitrogenous bases, and why are they important?

Back

Nitrogenous bases (adenine, thymine, cytosine, guanine) are the building blocks of DNA and RNA, encoding genetic information.

Front

What is the difference between DNA and RNA?

Back

DNA is double-stranded and contains thymine, while RNA is single-stranded and contains uracil instead of thymine.

Front

What is the function of ribosomes in the cell?

Back

Ribosomes are the sites of protein synthesis, translating mRNA into polypeptide chains.