PBS 2.2.1-2.2.3 Review

Front

What are cancerous cells?

Back

Cancerous cells are abnormal cells that grow and divide uncontrollably, often forming tumors and potentially spreading to other parts of the body.

Front

What does messenger RNA (mRNA) do?

Back

Messenger RNA carries a copy of the DNA code from the nucleus to the ribosomes, where proteins are synthesized.

Front

What is the complementary mRNA sequence for the DNA strand GTAGTCA?

Back

The complementary mRNA sequence is CAUCAGU.

Front

Which bases are found in RNA?

Back

RNA contains the bases adenine, uracil, cytosine, and guanine.

Front

What is the function of the centromere?

Back

The centromere is the structure that holds two sister chromatids together until they are separated during cell division.

Front

What is apoptosis?

Back

Apoptosis is the process of programmed cell death that occurs in multicellular organisms.

Front

What is the difference between DNA and RNA?

Back

DNA contains the bases adenine, thymine, cytosine, and guanine, while RNA contains adenine, uracil, cytosine, and guanine.

Front

What role do ribosomes play in protein synthesis?

Back

Ribosomes are the cellular structures where proteins are synthesized by translating mRNA into amino acid sequences.

Front

What is a chromatid?

Back

A chromatid is one half of a duplicated chromosome, which is joined to its sister chromatid at the centromere.

Front

Define chromatin.

Back

Chromatin is the complex of DNA and proteins that forms chromosomes within the nucleus of eukaryotic cells.