Intervention Bellwork

DNA replication results in two DNA molecules

• each with two new strands.

• one with two new strands and the other with two original strands.

• each with one new strand and one original strand.

• each with two original strands.

Which statement describes the role of DNA in a cell?

• A. DNA molecules are the building blocks of tissues and carry out the work of each cell.

• B. DNA molecules deliver the pieces of proteins to the site of protein assembly in the cell.

• C. DNA molecules are broken apart inside the cell, and the pieces are assembled into proteins.

• D. DNA molecules contain the information that the cell uses to assemble the pieces of proteins in the correct order.

Tags

NGSS.HS-LS1-1

When comparing the leading and the lagging strand in DNA replication, which statement is false?

• A. Nucleotides are added by DNA polymerase III in both strands.

• B. The enzyme primase adds an RNA primer to both DNA strands.

• C. Replication occurs continuously in opposite directions in the two strands.

• D. In the lagging strand only, the enzyme ligase binds DNA fragments together.

Which picture best represents a molecule of RNA?

• A

• B

• Both pictures represent an RNA molecule

• Neither picture represents an RNA molecule

Where can DNA be found in a prokaryotic cell?

• floating around in a nucleoid region of the cytoplasm

• protected within the nucleus of a prokaryotic cell

• floating on the folds of the golgi apparatus

• protected within the cell wall

Where can DNA be found within a eukaryotic cell?

• wrapped around chromosomes protected within the nucleus

• floating around the nucleoid region of cytoplasm

• within the cell wall for protection

• within the folds of the golgi apparatus

If a cell has 12 chromosomes, how many chromosomes will each of its daughter cells have after mitosis and cytokinesis?

• 4

• 12

• 6

• 24

Tags

NGSS.HS-LS1-4

The table describes the events of mitosis out of sequence. Which sequence accurately summarizes the process of mitosis from beginning to end?

• A. 1 - Y, 2 - W, 3 - Z, 4 - X

• B. 1 - Y, 2 - Z, 3 - W, 4 - X

• C. 1 - X, 2 - Y, 3 - W, 4 - Z

• D. 1 - X, 2 - W, 3 - Z, 4 - Y

Tags

NGSS.HS-LS1-4

Students viewed the cells in onion root tips using a light microscope. They collected data as shown in the table. What does the data indicate about the cell cycle?

• There are only 36 cells in the tip of an onion root.

• At any given time, most cells will be undergoing mitosis.

• Cells spend most of their time preparing for mitosis.

• Metaphase, anaphase, and telophase are slower processes.

Tags

NGSS.HS-LS1-4

In which stage of the cell cycle does DNA replicate to form identical sister chromatids?

• A. G1

• B. G2

• C. M

• D. S