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s344n2d4d5 [400]
3 years ago
11

The first model of enzyme action was proposed in 1894 by Emil Fischer. In this model, the lock is the enzyme and the key is the

substrate. Only the correctly sized key (substrate) fits into the key hole (active site) of the lock (enzyme). Much later, in 1958, the induced fit model was suggested by Daniel Koshland. The induced-fit theory assumes that the substrate plays a role in determining the final shape of the enzyme and that the enzyme is partially flexible. This explains why certain compounds can bind to the enzyme but do not react because the enzyme has been distorted too much. Which model BEST represents the newer version of the enzyme action model?
Biology
1 answer:
Andrews [41]3 years ago
5 0

Answer:

The correct answer is "the induced fit model".

Explanation:

The first model that looked to explain the enzyme and substrate interaction was the "lock and key" model. Although this model helped scientists to understand the specificity nature of the interaction enzyme-substrate, it does not reflect reality since enzyme was portrayed as a lock with a structure that doesn't change during the catalysis. Then half century later "The induced-fit theory" was proposed which fits much better the newer version of the enzyme action model. In this theory the enzyme is partially flexible and its structure changes as a result of its interaction with the substrate.

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Which fossil organism in whale evolution was the first to live mostly in water?
balu736 [363]
During the research Ambulocetus would be the first to consistently stay in water and Set over time they developed feet arms and <span>hands used to swim.</span>
5 0
3 years ago
The blood of an organism is responsible for passing genes from parent to child.
leonid [27]

Answer:

This is false as genes are transferred to a fetus from the reproductive cells(sperm, Egg cells)

Explanation:

This is because humans have 46 chromosomes, however this is comprised of the 23 chromosomes in each sperm and egg cells. This shows that genes are not transferred through the blood but by sperm and egg cells. Also genes and chromosomes are stored in the nucleus of cells, however red blood cells do not have a nucleus further showing that this is false.

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7 0
3 years ago
Read 2 more answers
Fruit flies have 8 chromosomes in their body cells, while dandelion cells have 16 chromosomes. Which species do you predict make
Finger [1]

Answer:

I think this might be the answer

Explanation: The answer is the same for every diploid species. It is half the number of chromosomes in somatic (body) cells. The number of cells in gametes (sex cells) is n and the number in somatic cells is 2n. For fruit flies gametes have 4 chromosomes, for mice, 20, for humans 23, for chimpanzees 24.

Hope this helps and stay safe.

4 0
3 years ago
If a horticulturist breeding gardenias succeeds in having a single plant with a particularly desirable set of traits, which of t
TEA [102]

Answer:

C) Clone the plant

Explanation:

Cloning is the process by which genetically identical offsprings are obtained naturally or artificially. In nature, genetically similar individuals or offsprings are obtained from asexual reproduction.  

If a horticulturist succeeds in having a single plant with the desired trait than to establish a line of such plant she should clone the plant so that the plants which are obtained after cloning have the same traits which were present in the parent plant. Therefore the correct answer is C.

3 0
3 years ago
Discuss how defective G protein function is associated with cholera.
Dvinal [7]

Answer:

The function of G-Protein’s become defective and abnormal after the addition ADP-ribose to the G protein by the A sub unit. this phenomenon is called as ADP-ribosylation which result in the permanent activation of G-protein . When the G-Protein become active, the enzyme adenyl cyclase converts ATP into cAMP. Increase concentration in the cAMP blocks the transportation of sodium from the lumen into the bloodstream. the amount of  Chloride and bicarbonate also increases. Due to the continuous increase of the ions, water moves into by osmosis from the bloodstream and cholera occurs.

Explanation:

4 0
3 years ago
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