EXERCISE 19 Bacteria and Protists Post-Lab Questions Introduction distinguishes
ID: 189723 • Letter: E
Question
EXERCISE 19 Bacteria and Protists Post-Lab Questions Introduction distinguishes bacteria from protists? 1. What major characteristic 19.1.A. Bacteria 2What form of bacterium is shown in this photomicrograph? (1100x) 19.1.C. Cyanobacteria 3. Examine the photomicrograph on the right, taken using an oil-immersion objective, the highest practical magnification of a light microscope. (The final magnification is 770x.) (a) Based on your observation, identify the kingdom to which the organism belongs. (770x) b) Justify your answer 4. Observe the photomicrograph on the right of an organism that was found growing symbiotically within the leaves of the water fern Azolla. (a) What is the common name given to an organism of this type? (b) Give the name and function of the cell depicted by the line (432x) Bacteria and Protists 1 263Explanation / Answer
S.No.
Bacteria
Protista
1
Prokaryotic organism
Eukaryotic organism
2
Colonial, mycelial, filamentous
colonial
3
Cell division by binary fission
Cell division by mitosis
4
double stranded circular DNA and extrachrmosomal Plasmid DNA
Linear DNA in the form of chromosomes wound by nucleosomes
5
The envelope is single
The envelope is double
6
Being prokaryotic in nature has 70S ribosomes. Eukaryotic mitochondria and plastid ribosomes are also having 70S (symbiotic theory)
Being eukaryotic in nature has 80S ribosomes. However, mitochondria and plastid ribosomes are 70S (symbiotic theory)
7
Organelle system absent, however they contain ribosomes
Organelle system present
8
Well defined nucleus system absent. They contain nucleoid
Well defined nucleus present with nuclear double membrane and nuclear pores
9
Cell wall contains peptidoglycan, teichoic acid, lipopolysaccharides
They may or may not have cell wall. But if cell wall is present it contains cellulose
10
Cell size is smaller (0.1-5m)
Cell size is larger (10-100m)
11
The flagella of bacteria (if present) is having single strand
The flagella of protista (if present) is having 11 strands
S.No.
Bacteria
Protista
1
Prokaryotic organism
Eukaryotic organism
2
Colonial, mycelial, filamentous
colonial
3
Cell division by binary fission
Cell division by mitosis
4
double stranded circular DNA and extrachrmosomal Plasmid DNA
Linear DNA in the form of chromosomes wound by nucleosomes
5
The envelope is single
The envelope is double
6
Being prokaryotic in nature has 70S ribosomes. Eukaryotic mitochondria and plastid ribosomes are also having 70S (symbiotic theory)
Being eukaryotic in nature has 80S ribosomes. However, mitochondria and plastid ribosomes are 70S (symbiotic theory)
7
Organelle system absent, however they contain ribosomes
Organelle system present
8
Well defined nucleus system absent. They contain nucleoid
Well defined nucleus present with nuclear double membrane and nuclear pores
9
Cell wall contains peptidoglycan, teichoic acid, lipopolysaccharides
They may or may not have cell wall. But if cell wall is present it contains cellulose
10
Cell size is smaller (0.1-5m)
Cell size is larger (10-100m)
11
The flagella of bacteria (if present) is having single strand
The flagella of protista (if present) is having 11 strands
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