Cells, Membranes, and Mitosis Warm up NAME ______

1. Which of the following examples of transport across a membrane requires energy?

a) the absorption of glucose into a muscle cell by facilitated diffusion

b) the flux of K+ out of a neuron as a nerve impulse is propagated

c) the removal of waste from a central vacuole by exocytosis

d) the reabsorption of H2O from across the wall of the large intestine

e) the diffusion of water across a cell membrane KAPLAN AP BIO PREP

2. Prokaryotic and eukaryotic cells share which of the following features?

a) a plasma membrane

b) Complex flagella (9+2)

c) Membrane-bound organelles

d) A membrane-bound nucleus

e) Linear chromosomes made of DNA and proteins KAPLAN AP BIO PREP

3. Cells that secrete large amounts of lipids have more ______than cells that do not secrete lipids.

a) smooth endoplasmic reticulum

b) peroxisomes

c) plastids

d) rough endoplasmic reticulum

e) liposomes RAVEN STUDY GUIDE

4. Which of the following best describes the fluid mosaic model of membranes?

a)The membrane consists of a phospholipid bilayer with proteins of various lengths and sizes located on the exterior portions of the membrane

b) The membrane consists of phospholipids bilayer with proteins of various lengths and sizes located in the interior of the membrane.

c) The membrane is composed of a phopholipid bilayer with proteins of uniform lengths and sizes located in the interior of the membrane.

d) The membrane consists of a phopholipid bilayer with proteins of various lengths and sizes interspersed among the phospholipids.

e) The membrane consists of a phopholipid bilayer with proteins of uniform length and size interspersed among the phospholipids.

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5. Which of the following represents an INCORRECT description of an organelle’s function?

a) Chloroplast: the site of photosynthesis and energy production in plants

b) Peroxisome: organelle that produces hydrogen peroxide as a by-product of reactions involved in the breakdown of fatty acids and detoxification of alcohol in the liver

c) Golgi apparatus: structure to which proteins, lipids, and other macromolecules are sent to be modified by the addition of sugars and other molecules to form glycoproteins

d) Rough endoplasmic reticulum: Membrane bound organelle lacking ribosmes on it cytoplasmic surface, involved in lipid synthesis, detoxification, and carbohydrate metabolism

e) Nucleus: the control center in eukaryotic cells, which acts as the site from replication, transcription, and posttranslational modification of RNA

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6. The destruction of which of the following would most cripple a cell’s ability to undergo cell division?

a) microfilaments

b) intermediate filaments

c) microtubules

d) actin fibers 5 Steps to a 5

e) keratin fibers

7. Which of the following is NOT true about cyclin-dependent kinase (CdK)?

a) It is present only during the M phase of the cell cycle

b) When enough of it is combined with cyclin, the MPF (mitosis promoting factor) formed initiates mitosis

c) It is a protein that controls other proteins using phosphate groups

d) It is present at all times during the cell cycle

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8. The first checkpoint in the cell cycle occurs

a) about the middle of M phase

b) at the beginning of G2 phase

c) just before entering the S phase

d) during the G0 phase

e) at the end of S phase Raven Study Guide

9. All of the following support the endosymbiotic theory that ancestors of mitochondria and chloroplasts were once independent, free-living prokaryotes EXCEPT:

a) mitochondria and chloroplasts divide independently of the eukaryotic host cell by a process similar to binary fission

b) mitochondria and chloroplasts carry on protein synthesis separately from the eukaryotic host cell

c) mitochondria and chloroplasts have ribosomes that more closely resemble those of bacteria than of eukaryotic cells

d) mitochondria and chloroplasts function independently of the eukaryotic host cell

e) mitochondria, chloroplasts, and bacteria have a single, circular chromosome without histones or proteins

CLIFFS 5 Practice Exams

10. Which of the following animal structures provides a function that most closely resembles the function of plasmodesmata in plants?

a) tight junctions

b) gap junctions

c) blastopores

d) synaptic clefts

e) desmosomes CLIFFS 5 Practice Exams

11. Phases of mitosis in a randomly dividing section of a root tip were observed through a microscope in the following numbers:

PHASE / Number of cells
Anaphase / 15
Interphase / 40
Metaphase / 10
Prophase / 20
Telophase / 15

Which of the following can be correctly concluded from this data:

a) DNA replication occurs during interphase

b) Interphase takes longer than all the other phases combined

c) Metaphase consumes the least amount of time during the cell cycle

d) Prophase is the fourth phase in the cell cycle

e) Prophase consumes 10 percent of the time required to complete the cell cycle.

CLIFF 5 Practice Exams

12. An animal cell in a hypertonic solution would

a) swell and burst

b) swell and exhibit turgor

c) shrink and shrivel up

d) not be affected, only plants cells are affected by changes in osmotic pressure

Barron’s AP Prep*

For Questions 13-16 , use the following answer choices:

A) Prophase

B) Metaphase

C) Anaphase

D) Telophase

E) Cytokinesis

______13. During this phase the split sister chromatids are considered to be chromosomes, and are moved to opposite poles of the cell

______14. During this phase the nucleus deteriorates and the mitotic spindle begins to form

______15. During this phase the two daughter cells are actually split apart

______16. During this phase the sister chromatids line up along the equator of the cell, preparing to split

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For Questions 17-20, use the following answer choices:
A) Cell wall

B) Mitochondrion

C) Ribosome

D) Lysosome

E) Golgi apparatus

______17. This organelle is present in plant cells, but not animal cells

______18. Absence of enzymes from this organelle can lead to storage diseases such as Tay-Sachs disease

______19. This organelle is the host for the Krebs cycle and oxidative phosphorylation of respiration

______20. This organelle is synthesized in the nucleolus of the cell.

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