mastering bio ch4 prt 3

Your intestine is lined with individual cells. No fluids leak between these cells from the gut into your body. Why? The intestinal cells are bound together by plasmodesmata. The intestinal cells are fused together into one giant cell. The intestinal cells are bound together by gap junctions. The intestinal cells are bound together by tight junctions.

The intestinal cells are bound together by tight junctions.

A certain cell has a dense nucleoid region, ribosomes, but no membrane-enclosed organelles. Based on this information, it could be __________. an archaean a yeast (fungus) cell a grasshopper cell a Paramecium

an archaean

Peroxisomes are organelles that are involved in the _____. synthesis of lipids breakdown of fatty acids generation of energy production of ribosomes

breakdown of fatty acids

Many researchers think that the first eukaryotic cells obtained energy for life-sustaining functions from organic compounds. Given this information, which of the following organelles most likely appeared last in eukaryotic cells? nucleus plasma membrane chloroplast ribosome

chloroplast

Where would ribosomes be located that are responsible for producing enzymes which play a role in sugar metabolism? smooth endoplasmic reticulum rough endoplasmic reticulum Golgi apparatus cytosol

cytosol

Cilia and flagella move thanks to the energy provided by __________, a special motor protein that can harvest energy from ATP. pseudopodia actin dynein arms basal bodies

dynein arms

Where are chlorophyll molecules located within the chloroplasts? within the outer membrane of the chloroplasts embedded in the thylakoid membrane within chloroplast ribosomes in the stroma

embedded in the thylakoid membrane

Which of the following structures is directly involved in the passage of electrical signals between cells as, for example, in the vertebrate heart? anchoring junctions tight junctions chemical synapses gap junctions

gap junctions

A disease called primary ciliary dyskenisia is characterized by abnormal ciliary movements. In these cilia, microtubule functioning is disrupted due to microtubules missing an essential component. This disease could be caused by __________. lack of dynein proteins too many integrin proteins lack of integrins lack of actin proteins

lack of dynein proteins

The cells of a person with adrenoleukodystrophy (ALD) swell with a buildup of fatty acids. In other words, fatty acids are not being broken down. Which organelle is most likely failing to function correctly? ribosome lysosome Golgi apparatus mitochondrion

lysosome

Which of the following organelles is found only in animal cells and NOT in most plant cells? mitochondrion lysosome chloroplast peroxisome

lysosome

The protein actin is a component of a(n) __________. microfilament tubulin intermediate filament microtubule

microfilament

You have identified a new organism. It has ribosomes, plasmodesmata, and cell walls made of cellulose. This new organism is most likely a(n) __________. bacterium prokaryote animal plant

plant

Of the following organelles, which group is involved in manufacturing the substances needed by the cell? smooth endoplasmic reticulum, ribosome, vacuole lysosome, vacuole, ribosome ribosome, rough endoplasmic reticulum, smooth endoplasmic reticulum vacuole, rough endoplasmic reticulum, smooth endoplasmic reticulum

ribosome, rough endoplasmic reticulum, smooth endoplasmic reticulum

Pancreatic cells produce large amounts of protein. About how many ribosomes would you expect there to be in a pancreatic cell? several million about ten one several hundred

several million

Which of the following is a function of the rough endoplasmic reticulum? synthesizing lipids regulating the liver's release of sugar to the blood synthesizing receptor proteins detoxifying drugs

synthesizing receptor proteins

If you wished to clearly observe the organelles inside of a white blood cell, which type of microscope would you choose? scanning electron microscope light microscope dissecting microscope transmission electron microscope

transmission electron microscope

What do the rough endoplasmic reticulum, Golgi apparatus, and lysosomes have in common? They all perform similar roles in the cell. All are located in the nucleus of the cell. They are all physically connected to each other. They are constructed of interrelated membranes.

They are constructed of interrelated membranes.

Chloroplasts are found in __________. neither plant cells nor animal cells animal cells only plant cells and some protists both plant cells and animal cells

plant cells and some protists