High School Biology, C Error, How to Change

The first question, why C is not right: the essence of cellular respiration is to convert the energy contained in glucose into the high-energy phosphate bonds of ATP, to put it bluntly, the result of cellular respiration is the production of ATP. If there is already ATP, then even if the cells do not breathe, there is still something to provide energy.

As you said, group B originally had some ATP, but it did not emit light after adding methyl substance and water, and if methyl is an inhibitor of cellular respiratory enzymes, then the original ATP of B will also emit light for a short period of time. Therefore, the more likely effect of substance A is to inhibit the decomposition of ATP into ADP, which fundamentally cuts off the energy**.

The second question: Is the step of adding glucose to groups B and A repeated: not repeated.

Group A added glucose after it did not emit light in order to test whether the substance that supplied energy for light was glucose, and the result did not emit light, proving that glucose was not supplying energy. The addition of ATP emits light, which proves that ATP is an energy-supplying substance. The experiment in Group B was a verification test that was carried out after knowing that the energy supply substance was ATP, that is, by inhibiting the decomposition of ATP, it was verified that ATP was a luminous energy supply substance from the reverse side.

Substance A inhibits the decomposition of ATP, so it does not emit light again, so combined with group A experiments, it is completely proved that ATP is supplying energy.

The third problem: ATP can be decomposed and emitted after water is added to group A; Group B is supplemented with water and substance A, and the function of substance A should be to inhibit the decomposition of ATP as mentioned in the first question, so that the purpose of the whole experiment is very clear. If you don't understand, please ask.

It's been a long time since I've seen a creature.

If the methyl substance is a cellular respiratory enzyme inhibitor, it inhibits respiration and cannot produce energy, but the original ATP will not be consumed and can still emit light.

A: There is no reaction to add glucose after ATP consumption, which proves that glucose cannot directly provide energy, how can it be repeated.

Although group B had ATP and luminaire powder, substance A was added, indicating that substance A inhibited the reaction. Then ATP is useless.

C option: 1Plants cannot directly absorb organic matter.

2.The excrement of earthworms is used as fertilizer, and the energy contained in it is stored in organic matter and cannot be absorbed, so this energy cannot flow to the crops, so it is wrong.

The stronger the light intensity on one side, the lower the auxin concentration on the light side, and when it is lower than the optimal concentration, the auxin promoting effect decreases with the decrease of auxin concentration, so C is wrong.

Option C: The breeding process of offspring III needs to be incorrect.

Analysis: Hybrid breeding is different according to the purpose of breeding. If it is a recessive individual, it does not need to be inbred with multiple belts, as long as the recessive trait appears, it can be directly selected; If it is a dominant individual (homozygous), it needs to be inbred with multiple belts.

If recessive homozygotes are required, lateral intercourse is usually used.

Isn't there an analysis, why don't you look at it.

Wrong in item c. In a double-stranded DNA molecule, the ratio of purines to pyrimidines is normally 1:1. （a=t，g=c）

If you don't understand biology, you know that c is wrong, x is a quantity, there are units, y is a proportion, there is no unit, the two are divided, from a dimensional point of view, the result is the same unit as x, exponential quantity, what asks you is proportion, it must be different.

In addition, in general, in DNA, the bases are complementary, and the purine is pyrimidine, so the ratio must be 1:1

The ratio of purines to pyrimidines should be the ratio of two purines to two pyrimidines, and the ratio cannot be calculated with only one, but the DNA is double-stranded, so the ratio is one to one.

The target cell is a nerve cell, and the signaling molecule released by the signaling cell on the left is a neurotransmitter, and the target cell should be a receptor for the neurotransmitter, which is a receptor protein instead of a channel protein.

1.The light is moderate, and the light that is too strong is not clear due to the reflection2Failure to directly wrench the objective may cause geometric deformation, and the converter can only be rotated 3To 4The objective lens must not be lowered to insert the hole, in case there is a lateral movement or something, it will be broken or broken5Right.

First of all, 1 sunlight does shine on the mirror, but it is not as bright as possible, too bright on the one hand to damage the eyes, on the other hand, the field of vision will be very white, and the image can not be found at all. It's like if you look at the sun, you can't see a kite flying in the sky. The difference between excluding a b and c d is 2, and then looking at 2, when the high and low magnification objective lens is converted, you can't pull the nosepiece, but the converter!

The objective lens is rotated on the converter, and the wrench objective lens may be pulled off! Then natural selection c-c

So look at 4** wrong? When packing, you can't let the objective lens be inserted into the clear hole, but lower it to the lowest, keeping a distance of 1 2 mm from the stage, and it seems that it can't be inserted into the clear hole at all when it is lowered to the lowest

1. Suitable light is sufficient, no need to be as bright as possible;

3. For low magnification lens to high magnification, the standard operation should rotate the converter, not the objective lens;

4. Before packing, the microscope is restored, and the two objective lenses are required to face forward, the lens barrel is reduced to a minimum, and the aperture is adjusted to the minimum.

The sunlight should be aligned with the flat mirror, not the brighter, the better; Use a converter to change the objective; The objective lens should be removed when packing. So 1, 2, 4 are wrong.