AP Biology Exam - Unit 4 Review

What is the name of the signaling molecule in cell communication?

• ligand

• receptor

• operon

• inhibitor

Phosphorylation cascades are often used for

• reception

• responses

• amplification

• termination

1.  Each of the following numbered processes are involved in signal transduction pathways:  
 I.  Response  
II.  Amplification  
 III.  Reception  
IV.  Transduction
Which of the following represents the sequence of events in a typical signal transduction pathway?

• I, II, III, IV
• III, I, IV, II
• II, IV, I, III
• III, IV, II, I

Tags

NGSS.HS-LS1-3

How do bacteria sense local population density?

• population sensing

• signal sensing

• quorum sensing

• bacterial sensing

Match the following descriptions to the appropriate stage of the cell cycle:

• G2

• DNA replication

• S phase

• synthesis of structures for cell division

• mitosis

• growth of cell organelles

• G1

• division of the nucleus/chromatids

• cytokinesis

• division of the cytoplasm

Tags

NGSS.HS-LS1-4

Arrange the following events of mitosis and cytokinesis in the correct order

• Duplicated chromosomes line up at the cell equator. Spindle fibers attach to each chromatid.

• Chromatids are pulled to opposite poles of the cell by spindle fibers

• The chromosomes condense and the nuclear envelop dissolves

• Daughter chromosomes are separated and the nuclear envelope forms

• The cytoplasm divides the two daughter cells are separate

Tags

NGSS.HS-LS1-4

What is the most probable arrangement of chromosomes in a cell during metaphase?

• a

• b

• c

• d

• e

Tags

NGSS.HS-LS1-4

Which of the following is characteristic of G0 phase?

• The cell is in preparation to divide

• The cell is in a non-dividing state

• Daughter cells enter G0 immediately after cytokinesis

• The cell replicates/duplicates its DNA

What is the term for all the stages of the cell cycle except for Mitosis?

• Interphase

• Prophase

• Metaphase

• Anaphase

Which part of the signaling pathway could consist of protein modification, second messenger production, amplification or a phosphorylation cascade?

• Reception

• Transduction

• Response

• All of these