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boyakko [2]
3 years ago
8

Which of the two tests would likely produce more false negatives with a shorter incubation time?

Biology
1 answer:
Masteriza [31]3 years ago
6 0

Answer: A short incubation time runs the risk of a false negative on the VP test, since not enough time may have elapsed to produce an adequate amount of acetoin to give a positive result. The pH change associated with mixed acid fermentation occurs fairly quickly and is less likely to be affected by shorter incubation.

b) The VP test would benefit most from a longer incubation time because it takes a while for the 2,3-butanodiol to be produced.

Explanation:

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Regulatory proteins bind to _____. the operator the lactose-utilization genes the regulatory gene RNA polymerase transcription f
jarptica [38.1K]

Answer:

Regulatory gene

Explanation:

Transcription is one of the major processes that occurs during gene expression. It is the transfer of the genetic instructions in DNA to mRNA. A strand of mRNA is made using complementary base pairs.

However, there is need for gene expression to be regulated.

Gene regulation refers to the mechanism that acts to induce or repress the expression of a gene. These include structural & chemical changes to the genetic material, binding of proteins to specific DNA elements to regulate transcription. These proteins that influences transcription by binding to specific nucleotide sequences (DNA segments/gene) are referred to as REGULATORY PROTEINS and those involved in regulating transcription of genes are called TRANSCRIPTION FACTORS.

Regulatory proteins controls the rate and manner of gene expression by binding to specific genes, thus, making it easy or hard for RNA polymerase (enzyme that attaches to DNA to synthesize mRNA molecule) to bind to the promoter of that gene.

Transcription factors (regulatory proteins) that promote gene transcription are called ACTIVATORS while those that decrease are called REPRESSORS.

5 0
3 years ago
Air passes from the trachea into the lungs through two large tubes called?
Levart [38]
The bronchi are where air passes from the trachea.
5 0
3 years ago
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Two masses exerting a force on each other is an example of Blank Space __________.
Zolol [24]
D. Universal Law of Gravitation.
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3 years ago
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As wastes navigate the large intestine, which features do they pass through, in order?
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They waste in the large intestine pass through the villi, where bacteria and other organisms help to digest nutrients and most oftenly absorb the water content ingested. 



Thank you for your question. Please don't hesitate to ask in Brainly your queries. 
5 0
3 years ago
What is the process that adds sediments to a landform called
Tems11 [23]

weathering takes it away

erosion builds up


Deposition is the geological process in which sediments, soil and rocks are added to a land form or land mass. Wind, ice, water, and gravity transport previously weathered surface material, which, at the loss of enough kinetic energy in the fluid, is deposited, building up layers of sediment.

the answer is deposition HOPE THIS HELPS

7 0
4 years ago
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