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Microbio exam #1
Terms in this set (22)
The prokaryotic transport system that involves a substrate-binding protein, a membrane-integrated transporter, and an ATP-hydrolyzing protein is
the ABC system
Some membrane proteins are involved in bioenergetic reactions, while some others are involved in membrane transport.
Aseptic technique refers to
The prevention of contamination
Which statement is CORRECT?
1.Both micronutrients and growth factors are organic compounds essential for cell growth.
2. Micronutrients are metals, but growth factors are organic.
3 .Micronutrients are organic, but growth factors are metals.
4. Both micronutrients and growth factors are essentially metals.
Micronutrients are metals, but growth factors are organic
What is the function of bactoprenol?
It is a hydrophobic alcohol that transports peptidoglycan precursors across the cytoplasmic membrane.
Growth is defined as an increase in
Number of cells
Housekeeping genes are present in
The precursor of each new nucleotide in a strand of DNA is a
In all cells, genes are composed of
During eukaryotic RNA processing methylated guanine nucleotides are added at the ________ terminus in a process called ________.
The processes of transcription and translation are coupled processes in
In eukaryotes, DNA is wound around clusters of histones, forming structures known as nucleosomes
The regulation of enzyme synthesis is usually a more rapid process than the regulation of enzyme activity
Histones are ________, so they combine strongly and relatively nonspecifically with ________ DNA.
The function of a kinase is
Regarding early life on Earth,
Microbial life existed for billions of years before plant and animal life
Basic microbiology can be used to
1.Probe the fundamental processes of life
2. Model our understanding of cellular processes in multicellular organisms, including humans.
3. Study characteristics of cells of multicellular organisms.
In what/which domain(s) of life is/are microorganisms represented? Archaea, Bacteria, Eukarya, or all of them
All of them
The ultimate limit of what we are able to see with a microscope is dictated by
Protein-coding sequences of DNA are known as
According to our present understanding, mitochondria and chloroplasts are ________ in origin.
Carrier-mediated transport is necessary when
1. The level of nutrients in nature is very low.
2. Diffusion will not allow adequate amounts of a substance to enter the cell.
3. Movement into the cell is against a concentration gradient.
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