Ch. 3 Study Guide

Cilia in eukaryote cells

---can be used in eukaryotes to do any of these functions. can beat in unison to help a single cell, such as a protist, to swim. can assist digestive tract cells in absorbing food molecules. can move in unison to establish a current to move objects, as with human eggs through the reproductive tract. can add surface area for senses such as taste, smell, balance, hearing.

In order for a milk protein to be secreted in mammals, these events must happen in the correct organelle function sequence.:

DNA transcription in the nucleus-passage of mRNA out of nucleus; translation of mRNA by the ribosome-packaging of proteins by the endoplasmic reticulum

Cancer cells are cells that?

Divide relentlessly, forming solid tumors or flooding the blood with abnormal cells.

Enzymes that breakdown organic molecules in a cell, by hydrolysis, are typically found in which organelle?

Lysosomes

A cytoskeleton is:

a system of tracks used for intracellular transport. found in the cytoplasm of eukaryotic cells. ----All of the answer choices are correct. a structure that aids in the process of cell division. composed of microtubules, microfilaments, and intermediate filaments.

How do vesicles carrying proteins destined for secretion move to the plasma membrane?

along microtubules

Which are recycling centers for the cell?:

central vacuole and lysosome

A junction that is a protein channel linking the cytoplasms of adjacent animal cells is called a(n):

gap junction.

You have macrophage white blood cells that can respond to injury and infection by moving to the site of the wound. They can ingest infectious bacteria or virus, and digest the organic molecules of what they take in. The digestion organelle they have is the

lysosome.

Which of the following organelles are cellular digestion centers?:

lysosomes and peroxisomes

Nuclear pores have proteins that open and close, controlling flow of cell solutions and molecules in and out of the nuclear envelope. In this, nuclear pores are similar in structure and function to:

messenger molecule? (not sure....)

What is the role of actin in eukaryotic cells?

mobility and contraction during cell division (mitosis).

The main organelles and structures involved by distinct function with milk production and secretion in their correct sequence are:

nucleus, nuclear pore, rough ER, smooth ER, transport vesicle, Golgi apparatus, vesicle for secretion.

Liver cells help clean your blood with a wide range of digestive enzymes that hydrolyze toxic molecules. The liver cells would have ____, which are organelles specialized to do this.:

peroxisomes

The primary structural molecule composing a cell membrane is a(n):

phospholipid molecule.

You are working on a forensics team and collect some cells from a crime scene. The cells are angular, rigid, and have a cell wall made up of cellulose. This sample most likely came from a(n):

plant.

Plant growth and flowering are strongly controlled by root and stem signal chemicals. Which of the following cell connection transports these molecules between adjacent cells?

plasmodesmata

Between their specialized functions, the rough and smooth endoplasmic reticulum do not:

produce mRNA.

A central vacuole of a mature plant cell:

produces turgor pressure.

In a human, the intestines need to form a barrier to prevent bacteria and other microbes from moving into the bloodstream from the gut. Which of the following would prevent bacteria from moving between intestinal cells?

tight junction

What is the role of tubulin during mitosis in eukaryotic cells?

to create chromosome movement.

Function of Golgi apparatus:

to modify, package, secrete, and export proteins by the cell.