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1
Which of the following is not a characteristic of bacterial cells?
A)Bacterial cells are eukaryotic.
B)Bacterial cells do not have an organized nucleus.
C)Bacterial cells have a cell wall.
D)Bacterial cells have a single circle of DNA.
2
When exposed to harsh conditions, some bacteria form ______________.
A)capsules.
B)endospores.
C)pili.
D)flagella.
3
The basic structure of a virus contains ____________.
A)a nucleic acid
B)a cell wall
C)a protein coat
D)both a and c
4
Gram-negative bacteria have what advantage over gram-positive bacteria?
A)Gram-negative bacteria are better able to survive environmental changes than are gram-positive bacteria.
B)Gram-negative bacteria are able to survive longer without water than can gram-positive bacteria.
C)Gram-negative bacteria can metabolize a wider variety of nutritional materials than can gram-positive bacteria.
D)Gram-negative bacteria are able to resist antibiotics that attack the cell wall while gram-positive bacteria are susceptible to these drugs.
E)Gram-negative bacteria have longer life cycles than do gram-positive bacteria.
5
At the end of conjugation, both of the cells involved __________________.
A)form endospores.
B)perish.
C)develop organelles.
D)have a copy of the plasmid DNA.
E)are able to degrade most antibiotics.
6
Scientists now suspect that the first macromolecules were ________.
A)proteins
B)DNA
C)RNA
D)viruses
E)bacteria
7
The capsid of a virus consists of
A)RNA
B)DNA
C)protein
D)lipid
E)both b and c
8
Which cellular structure is key to phagotroph nutrition?
A)chloroplast
B)lysosome
C)nucleus
D)centrosome
9
Fungi feed by
A)internal digestion.
B)external digestion.
C)phagocytosis.
D)photosynthesis.
10
Organisms that move by means of pseudopodia belong to the group _____________.
A)algae.
B)amoebas.
C)diatoms.
D)euglenoids.
11
Volvox are an example of __________.
A)multicellularity.
B)aggregation.
C)a colonial organism.
D)a sexually reproducing organism.
E)photosynthetic protozoans.
12
In protists, a dormant form of a cell adapted to survive harsh conditions is called a(n) _______.
A)hypha
B)endospore
C)spore
D)cyst
13
Which of the following characteristics distinguishes true multicellularity?
A)size of the organism
B)cell specialization
C)intercellular coordination
D)cell number
14
Fungi are different from plants because fungi _____________________.
A)are heterotrophs.
B)have filamentous bodies.
C)have cell walls made of chitin.
D)all of the above
15
Which of the following is a reproductive method of fungi?
A)asexual
B)sexual
C)binary fission
D)both a and b
16
Which one of the following groups of fungi has not been observed to reproduce sexually?
A)Ascomycota
B)Imperfect fungi
C)Basidiomycota
D)Zygomycota
17
Most fungi obtain their nutrients by ___________________.
A)producing enzymes which are secreted into their environment and digest the nutrients.
B)absorbing their nutrients.
C)digesting them inside a specialized compartment inside the organism.
D)photosynthesis.
E)both a and b
18
A characteristic that is unique to the fungi is ______________.
A)nuclear mitosis.
B)binary fission.
C)the presence of chitin.
D)absorption of nutrients.
E)the presence of cellulose.
19
In lichens the photosynthetic partner is a(n) ___________________.
A)alga
B)plant
C)cyanobacterium
D)all of the above
E)both a and c
20
All of the following are correct concerning viruses except:
A)They can usually be seen with the light microscope.
B)They occur in all organisms.
C)They can only reproduce inside cells.
D)They can have a membrane-like envelope surrounding them.





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