Binary Fission in Bacteria Quiz

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What is the process called when a parent cell is pinched in two, producing two completely separated cells in eukaryotic cells?

Binary Fission

Meiosis

Budding

Mitosis (correct)

Which statement about the cell cycle regulation is accurate?

Liver cells divide only when necessary (correct)

All cells in the human body divide at the same frequency

Nerve cells in a mature human divide frequently

Cancer cells follow the usual controls of the cell cycle

What happens to the chromosome during binary fission in prokaryotic cells?

It replicates (correct)

It remains the same

It divides into two equal parts

It fuses with another chromosome

What drives the cell cycle in eukaryotic cells according to the text?

Specific chemical signals in the cytoplasm Signup and view all the answers

When do human skin cells divide throughout life?

Throughout life Signup and view all the answers

What happens when cultured mammalian cells at different phases of the cell cycle are fused?

Cells form a single cell with two nuclei Signup and view all the answers

What best distinguishes living things from nonliving matter?

Ability to produce more of their own kind Signup and view all the answers

What is the key role of cell division in multicellular eukaryotes?

Enabling cell renewal and repair Signup and view all the answers

Which phase alternates with interphase in the eukaryotic cell cycle?

Mitotic phase Signup and view all the answers

What is the genetic material of a cell called?

Genome Signup and view all the answers

In which type of division can sperm and egg cells be produced?

Meiosis Signup and view all the answers

What distinguishes meiosis from most other types of cell division?

Results in haploid cells Signup and view all the answers

What is the role of the MPF complex when cyclins accumulate during G2 associate with Cdks molecules?

It activates mitosis by phosphorylating proteins. Signup and view all the answers

Which checkpoint is considered the most important for many cells in the cell cycle?

G1 checkpoint Signup and view all the answers

What prevents anaphase from beginning at the M checkpoint?

Attachment of chromosomes to the spindle Signup and view all the answers

Which outcome is likely if a cell does not receive a go-ahead signal at the G1 checkpoint?

The cell will enter the G0 non-dividing phase. Signup and view all the answers

What is the purpose of growth factors in cell division?

To trigger other cells to divide Signup and view all the answers

How do external factors like lacking essential nutrients influence cell division?

They cause cells to fail division. Signup and view all the answers

What is the role of asters during cell division?

Forming a radial array of short microtubules Signup and view all the answers

When do sister chromatids separate during cell division?

Anaphase Signup and view all the answers

What is the function of kinetochores in cell division?

Attaching spindle microtubules to chromosomes Signup and view all the answers

How is cytokinesis accomplished in animal cells?

Through cleavage with a contractile ring of actin microfilaments Signup and view all the answers

What happens during prophase of cell division?

Replication of the centrosome Signup and view all the answers

How do nonkinetochore microtubules contribute to cell division?

By overlapping and pushing against each other Signup and view all the answers

What are the two types of regulatory proteins involved in cell cycle control?

Cyclins and Kinases Signup and view all the answers

Which phase of the cell cycle has checkpoints where the cycle stops until a go-ahead signal is received?

G1 phase Signup and view all the answers

What is required for a kinase to be active in cell cycle regulation?

Attachment to a cyclin Signup and view all the answers

What is the role of MPF (maturation-promoting factor) in the cell cycle?

Triggers passage into the M phase Signup and view all the answers

At which phase of the cell cycle do the peaks of MPF activity and cyclin concentration correspond?

M phase Signup and view all the answers

Why are cyclin-dependent kinases (Cdks) called so?

Because they need to be attached to cyclins to be active Signup and view all the answers