Your Bodies Molecular Machines

What is the term used to describe the normal death of cells?

• Mitotic failure

• Cellular dysfunction

• Programmed cell death

• Cellular decay

What is the process called when cells divide to create new cells?

• Mitosis

• Meiosis

• Fission

• Fusion

Tags

NGSS.HS-LS1-4

What molecule is described as having a double helix structure?

• Lipid

• DNA

• Protein

• RNA

What is the role of helicase in DNA replication?

• To bind the DNA strands together

• To cut the DNA into smaller pieces

• To add new nucleotides to the DNA strand

• To unwind and separate the DNA strands

What structure is DNA wrapped around to form a nucleosome?

• Chromatin

• Mitochondria

• Ribosomes

• Histones

What is the shape of chromosomes visible under a microscope during cell division?

• Irregular

• Characteristic X-shape

• Circular

• Linear

What is the kinetochore's role during cell division?

• To ensure chromosomes are correctly attached to microtubules

• To synthesize new proteins

• To produce energy for division

• To duplicate DNA

What does the dynein motor do?

• It creates new histones

• It synthesizes new cell membranes

• It carries away the 'stop' signal from the kinetochore

• It duplicates the DNA

Tags

NGSS.HS-LS1-4

What is still unknown about the process of cell division?

• How chromatids are pulled to opposite ends

• How DNA replicates

• The role of mitochondria

• How the cell membrane forms

Tags

NGSS.HS-LS1-4

What does the existence of molecular machines inside us suggest about future scientific advancements?

• That we can develop our own molecular machines for body repair

• That we can create artificial cells

• That we can stop all diseases

• That we can live forever