High school biology questions, please teach everyone, high school biology questions, ask the great g

p17, the enzyme that catalyzes the hydrolysis of lipase.

Lipase"It is an enzyme, and the enzyme is a protein, so it is natural to use protease.

p25 juvenile whiteheads are due to the inability to secrete melanin.

For the answer of the landlord on the first floor to option d, I would like to propose a calculation that calculates the relative of "1 2 angular rate".

The easy way (I personally think it's relatively simple.) )

Selecting C Mendel from the 3:1 segregation ratio of the F2 generation, it is speculated that the traits of organisms are determined by paired genetic factors, and the paired genetic factors are separated from each other when gametes are produced, then the individual ratio of the three genotypes in F2 is close to 1:2:

1. These are the contents of "hypotheses". After the hypothesis is proposed, it is "deducted" and experimentally verified. If the hypothesis is true, then the progeny will appear 1:

1 trait segregation ratio, which is a deduction of the hypothesis. After that, he did a test experiment, and the result was 1:1, and the experimental result was consistent with the expected result, indicating that the hypothesis was valid.

d This is how Mendel discovered the law of gene segregation. c is the inspection process.

。Note that the endosperm is double fertilized.

However, the fertilized eggs are all written incorrectly.

The sex of the offspring is determined by the paternal parent, and both a and d are wrong.

The protein you are talking about is penetrating and embedded in the surface of phospholipids, and it is not fixed.

Free proteins are simple proteins, and since this is the case, globulins are simple proteins, and antibodies are globulins, so if antibodies (a globulin) are combined with other substances, they have no effect.

Just as the antibody in the allergic reaction can adsorb on the surface of the cell membrane, some people understand that the antibody is to bind to the antigen and the target cell to find its due effect.

I'll give you a counterexample, hormones are free proteins, and hormones do not bind to other substances, and if they are combined, they will lose their other effects.

It's hormones that regulate.

Hormones need to circulate through body fluids to the target cells to function.

That is, such a protein must be free.

The main function of proteins (the main bearers of life activities):

important substances that make up cells and organisms, such as actin;

Catalysis: e.g. enzymes;

Regulatory effects: such as insulin, growth hormone;

Immune effects: such as antibodies, antigens;

Transport: such as hemoglobin in red blood cells.

Total photosynthesis (also called true photosynthesis) is the total amount of oxygen produced by plant photosynthesis, or the organic matter obtained by the whole process, theoretically, not counted.

The apparent photosynthesis rate (also known as net photosynthesis) can be understood as the effect of photosynthesis that is "seen" in appearance, which is the actual oxygen released or the organic matter obtained, which is minus the consumption of respiration.

And the key to this question is what the histogram represents. CO2 is the amount released (this is the external release) and O2 is the amount produced (this is calculated).

The amount of CO2 released in Figure A is the difference between the amount of CO2 produced by respiration and the amount of CO2 consumed by photosynthesis. When the light intensity is b, CO2 is released, indicating that the respiration rate is greater than the true photosynthetic rate. When the light intensity is A, only CO2 is released, indicating that only respiration is performed.

The respiration rate should have been the amount of CO2 produced in the dark (not counting the consumption), but this question is special, CO2 is the amount released, and the consumed is produced by photosynthesis to produce oxygen, and the ratio of the two is 1:1 (depending on the reaction formula), so this is the equation for the answer.

Typing is tiring.