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harina [27]
3 years ago
13

Which of the following regarding the Ames test is true?

Biology
1 answer:
sveticcg [70]3 years ago
8 0

Answer:

Option (2).

Explanation:

Ames test is used to identify the mutageneicity of the compound. The bacteria are treated with chemicals in the nutritive environment to determine whether the substance can acts as a mutagen or not.

The bacteria that can restore the biosyntheic activity in the environment can be considered as mutagen. The mutant bacteria can be easily identified in the Ames test.

Thus, the correct answer is option (2).

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Some potassium-sparing diuretics increase urination without the loss of potassium by working against receptors for: Some potassi
12345 [234]

Answer:

The correct answer is Aldosterone

Explanation:

Aldosterone is a steroid hormone that is secreted from the adrenal cortex.Aldosterone helps in the excretion of potassium ions from our body.

       That means if potassium sparing diuretics increase urination witout loss of potassium ion from our body then these diuretics will have to work against receptor foe aldosterone.

7 0
3 years ago
Which abiotic factor in tropical forests do boreal forests lacks
Harman [31]

Answer:

They are cooler and drier than tropical rain forests. Abiotic factors, or nonliving factors, of a temperate rain forest include temperature, water, cloud cover, soil and light. These abiotic factors interact with biotic, or living factors, to form the rain forest's unique ecosystem.

7 0
3 years ago
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You isolate chromosomes from the salivary gland of an organism and prepare a glass slide of the chromosome preparation. When you
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Answer: the name used is polytene chromosomes.

Explanation:

Polytene chromosomes are produced when repeated rounds of deoxyribonucleic acid (DNA) replication without cell division forms a giant chromosome, they have thousand of DNA strands and provides high level of function in the salivary glands.

At interphase, polytene chromosomes are seen to have distinct thick and thin banding patterns, these bands are of 2 types, the dark band (dark stained,

contains more DNA and less RNA) and the interband (light stained, more RNA and less DNA). The bands enlarge and forms a swelling called puff in certain times, the puffing (which is the formation of puff) is caused by the uncoiling of individual chromomeres in a band. The puffs indicate the site of active genes where mRNA synthesis takes place. These distinct banding patterns are used to study the function of genes in transcription because they permit high level of gene expression.

4 0
4 years ago
What phylum do frogs belong to?
Romashka-Z-Leto [24]
Phylum: Chordata hope this helps
7 0
3 years ago
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A large portion of cellular respiration happens in the mitochondria. For this reason, the mitochondria are known colloquially as
Lynna [10]

Answer:

im thinking its the lungs, not 100% sure but seems like the best answer.

Explanation:

the main function of the lungs is the process of gas exchange (respiration), and mitochondria is also responsible for respiration too.

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