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nadya68 [22]
3 years ago
11

When lactose is present, the E. Coli will "turn on" the lactase gene. True False

Biology
2 answers:
larisa [96]3 years ago
7 0

Answer: true

Explanation: when high levels of lactose are present, an isomer form of lactose, allolactose , will go and bind with the depressor protein to make it inactive

Vaselesa [24]3 years ago
4 0

Answer:

true

Explanation:

lactase is the enzyme that leads to the hydrolisis of lactose, when lactose is present the e coli needs to hydrolyse it to simple sugars so it needs to active the gene for lactase synthesis

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Monosaccharides can be grouped as aldehydes and kefone groups,what is their difference and similarities and list four examples f
Lady bird [3.3K]

Answer:

Aldehyde has C=O bonded to atleast one H atom while Ketone has C=O bonded to two carbon atoms

Aldehyde - galactose, glucose, glyceraldehyde, fructose

Ketone - Trioses, Tetroses, Pentoses, Hexoses

Explanation:

Similarity

Both the aldehyde and ketone have C=O group

Difference

In aldehye the C=O group require atleast one hydrogen atom or the functional group in aldehyde is -CHO

while in ketone the function group is C=O only that is bonded to two carbon atoms.

Example

Aldehyde - galactose, glucose, glyceraldehyde, fructose

Ketone - Trioses, Tetroses, Pentoses, Hexoses

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3 years ago
What was Edwin Hubble's contribution to the field of astronomy?
erastova [34]

Answer:

B he proved that the heliocéntrico model accurately described tour solar system

Explanation:

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2 years ago
The most efficient control of eukaryotic gene expression is achieved at the level ofA) replication.B) transcription initiation.C
iris [78.8K]

B) transcription initiation

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3 years ago
Name 2 ways forelimbs are different that hindlimbs
Mice21 [21]
Depending on if your speaking of a human or animal.  The kind of animal matters as well.  Hind limbs tend to be stronger like with frogs and rabbits because they use them to jump and kick.  With animals like squirrels, there forelimbs are used for picking up food.  Hind limbs are also longer on many animals.  
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Vegan vegetarians must rely on complimenting proteins in order to get all the essential amino acids. choose the best combination
liubo4ka [24]
If you want a complete protein in one food, tofu is probably your best bet. However, since you're probably not going to want to eat that every day, the best thing to do is eat a variety of high protein foods. Mix your proteins in order to get complete proteins. So, have say a grain (quinoa, millet, or brain rice are good) and have it with beans, or tempeh, or seitan, or nuts, etc. If you search for specific foods on that site, it'll show you which of the amino acids that food contains, and let you search for foods with complementary proteins. So if you want to be extra sure you're getting enough complete proteins, check what you're eating to see the amino acids in all of the different foods.
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