pre lab week 3 biology Flashcards


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1

What organelle in the amoeba and paramecium is an adaptation to living in a hypotonic environment?

contractile vacuole

2

What shape are onion cells?

rectangular

3

Bacteria have vacuoles.

False

4

A cell has the following molecules and structures: enzymes, DNA, ribosomes, plasma membrane, and mitochondria. It could be a cell from which of the following?

either a plant or an animal

5

A cellular diameter of 40 micrometers is equivalent to:

0.04 mm

6

What is the function of vacuoles in plant cells?

storage

7

Some amoeba can be pathogenic to humans.

true

8

What is the method of motility of paramecium?

cilia

9

Amoeba survive in what type of habitat?

aqueous environment

10

The part of the onion you eat (and the part that was used for study in lab):

grows below ground.

11

Eukaryotic cells are typically larger than prokaryotic cells because:

their internal membrane system allows compartmentalization of functions and extra surface area for nutrient exchanged and placement of enzymes.

12

What is the stinging organelle of paramecium that assists it in capturing large prey?

trichocyst

13

Which of the following organelles enables the Euglena to be photoautotrophic?

Answers:

central vacuole

lysosomes

chloroplasts

mitochondria

tonoplast

chloroplasts

14

What is the thick layer that surrounds each onion cell?

Answers:

interstitial space

the plant circulatory system

cell membrane

cell wall

cell wall

15

How does the composition of bacterial cell walls differ from that of plant cell walls?

Answers:

Bacteria have an extensive network of crosslinked teichoic acids in their cell walls, while plant cell walls are composed primarily of cellulose.

Bacteria have cell walls composed of peptidoglycan, while plant cell walls are composed primarily of cellulose.

Bacteria have cell walls composed of chitin, while plant cell walls are composed primarily of cellulose.

Both plants and bacteria have cell walls composed of cellulose; the cellulose fibers are more extensively crosslinked in bacteria than in plant cells.

  • Question 20 2 out of 2 points

Bacteria have cell walls composed of peptidoglycan, while plant cell walls are composed primarily of cellulose

16

Paramecium are predators of:

Answers:

invertebrates.

insects.

plants.

bacteria

bacteria

17

What was the genus and species of amoeba you studied in lab?

Entamoeba histolytica

Achanthamoeba

Naegleri fowleri

Amoeba proteus

Amoeba aurelia

Amoeba proteus

18

What is the genus and species of the potentially deadly amoeba that causes amoebic meningoencephalitis?

Amoeba caudatum

Acanthamoeba

Naegleri fowleri

Entamoeba histolytica

Amoeba proteus

Naegleri fowleri

19

In the absence of direct sunlight, the euglena might lose its:

chloroplasts.

flagella.

mitochondria.

food vacuoles.

chloroplasts.

20

Which organelle, within the paramecium, controls sexual reproduction?

nucleus

micronucleus

nucleolus

nucleoid region

micronucleus

21

Bacteria have cell walls.

True False

true

22

What is the mechanism by which Euglena move?

extension of cytoskeletal structures

flagella

cilia

amoeboid movement and pseudopods

flagella

23

What part of the onion plant carries out photosynthesis?

tubers

stolens

the roots

the bulb

all parts above ground

all parts above ground

24

How many flagella do Euglena have?

1

more than 2

0

2

2

25

Paramecium are heterotrophs. How do they obtain nutrients from their surroundings?

through the trichocyst

by releasing enzymes outside the cell to digest any available food sources in the immediate environment.

through their oral grooves.

by use of their contractractile vacuoles

through their oral grooves

26

By what mechanism do amoeba move?

:They secrete a mucopolysaccharide extracellularly that enable them to slide along moist surfaces.

They form pseudopods, and have cytoplasmic streaming.

They are ciliated organisms.

They are flagellated organisms.

They form pseudopods, and have cytoplasmic streaming

27

Amoeba are:

:anaerobic organisms

microaerophilic organisms.

aerobic organisms.

aerobic organisms.