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3 years ago

Which statement is true about the cells in multicell organisms?

Biology

2 answers:

OLga [1]3 years ago

8 0

Well what’s the statement

krek1111 [17]3 years ago

7 0

Answer:

A) The cells contain different genes and therefore express different genes.

Explanation:

In multicellular organisms, cells contain different genes and therefore express different genes.

If all the differentiated cells in an organism contain the same genes, and all the genes have the potential to be expressed, how do the cells become differentiated or specialized? The answer to this question is in the genes that are active in different cell types, that is, the great differences between cells in an organism result from the selective expression of genes. As a developing embryo undergoes successive divisions, specific genes are activated in different cells for different periods of time. Groups of cells follow distinct developmental pathways, and each group develops a particular type of tissue. Finally, in the mature organism, each cell type has a different pattern of genes that are expressed

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Which part of cellular respiration uses 2 ATP and produces 4 ATP per glucose molecule

Margarita [4]

Glycolysis. Two molecules of ATP are used at the start of the process, where a phosphate group is added to the Glucose molecule. 4 molecules of ATP are gained later in the process, making a net gain of 2 ATP molecules for the entire process.

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4 years ago

A long chain carbohydrate, such as starch, that is composed of hundreds to thousands of glucose molecules, is called

Andrew [12]

Answer:

Polysaccharide

Explanation:

Carbohydrates are one of the of the four biological molecules in living systems. They consists of simple units called monosaccharide, or commonly called simple sugars. The polymers of carbohydrate are made up of thousands of these monosaccharides linked together via a glycosidic bond.

For example, the starch molecule is a carbohydrate polymer made up of hundreds to thousands of glucose molecules (monosaccharide) linked together. Hence, a long chain carbohydrate made up of series of monosaccharide like starch is called a POLYSACCHARIDE i.e. many saccharides or simple sugar unit

4 0

3 years ago

The moon exerts a greater influence then the sun because it is closer . True or false

taurus [48]

False, because the moon is closer but the sun have the greater effect on earth. Is sun is hot and moon just comes out at night

7 0

3 years ago

3 types of animal like protest at least 3 types of plant like protest and at least 1 example of fungi like protozoan

MArishka [77]

Answer:

Animal-like protists include the flagellates, ciliates, and the sporozoans.

Explanation:

7 0

3 years ago

TO<br> 1. Choose the correct order of events in the Kreb's cycle:

Mama L [17]

Answer: the correct order of krebs cycle is

Explanation:In the first step of the citric acid cycle, acetyl CoA}CoA, C, o, A, end text joins with a four-carbon molecule, oxaloacetate, releasing the {CoA}CoAC, o, A, end text group and forming a six-carbon molecule called citrate.

Step 2. In the second step, citrate is converted into its isomer, isocitrate. This is actually a two-step process, involving first the removal and then the addition of a water molecule, which is why the citric acid cycle is sometimes described as having nine steps—rather than the eight listed here

Step 3. In the third step, isocitrate is oxidized and releases a molecule of carbon dioxide, leaving behind a five-carbon molecule—α-ketoglutarate. During this step,

s, N, A, D, is reduced to form N, A, D, H, end text. The enzyme catalyzing this step, isocitrate dehydrogenase, is important in regulating the speed of the citric acid cycle.

Step 4. The fourth step is similar to the third. In this case, it’s α-ketoglutarate that’s oxidized, reducing {NADH} NADH and releasing a molecule of carbon dioxide in the process. The remaining four-carbon molecule picks up Coenzyme A, forming the unstable compound succinyl , C, o, A, end text. The enzyme catalyzing this step, α-ketoglutarate dehydrogenase, is also important in regulation of the citric acid cycle.

dit: modified from "Oxidation of pyruvate and citric acid cycle

Step 5. In step five, the C, o, A, is replaced by a phosphate group, which is then transferred to. In some cells, —guanosine diphosphate—is used instead of —guanosine triphosphate—as a product. The four-carbon molecule produced in this step is called succinate.

Step 6. In step six, succinate is oxidized, forming another four-carbon molecule called fumarate. In this reaction, two hydrogen atoms—with their transferredThe enzyme that carries out this step is embedded in the inner membrane of the mitochondrion, so it can transfer its electrons directly into the electron transport chain.

Step 7. In step seven, water is added to the four-carbon molecule fumarate, converting it into another four-carbon molecule called malate.

Step 8. In the last step of the citric acid cycle, oxaloacetate—the starting four-carbon compound—is regenerated by oxidation of malate. Another molecule of NADPH

4 0

3 years ago