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Andrei [34K]
3 years ago
13

If 20% of a DNA molecule is adenine what percent is guanine

Biology
1 answer:
WINSTONCH [101]3 years ago
5 0
30% sorry if it's wrong
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Does sugar molecules provide all elements needed to make four types of macromolecules?
fomenos

Answer:

No, If that was the case, then we should only be eating carbohydrates.

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2. In the SN1 mechanism, the second step is attack of the nucleophile, so increasing the nucleophile concentration should speed
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Answer:

The rate of reaction depends on the rate determining step of a nonelementary reaction

Explanation:

A non elementary reaction is a reaction that proceeds in a sequence of steps. One of the steps is usually the slowest step in the reaction sequence. This slowest step is called the rate determining step. In an SN1 reaction, the rate determining step is the formation of the carbocation, the concentration of the carbocation affects the rate of reaction because it is involved in the rate determining step. The attack of the nucleophile is a fast step and does not affect the rate of reaction.

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3 years ago
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What term best describes the following organism: the so-called blue-green algae, they are photosynthetic bacteria; producing oxy
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Answer:

The correct answer will be option E.

Explanation:

The features given in the question are the characteristics features of the group of bacteria belonging to Cyanobacteria.

These Cyanobacteria are the prokaryotes which are capable of synthesizing the food through a process called photosynthesis. These bacteria use sunlight as their energy, use water and air to synthesize food. They under anaerobic condition synthesize the nitrogen in special structures called heterocyst, a characteristic feature of cyanobacteria.

Thus, the features given in the question are:  

1. contain photosystems to carry out photosynthesis.

2. producing oxygen

4. contain phycobilins

6. Hetrocysts: nitrogen-fixing structures.

7. The ancestor of plant chloroplasts.

Thus, option E is the correct answer.

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3 years ago
Differentiate between gamopetalous and polypetalous​
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the difference between polypetalous and gamopetalous, is that polypetalous is (botany) having a corolla composed of distinct, separable petals while gamopetalous is (botany) having petals wholly or partially fused such that the corolla takes the form of a tube.Explanation:

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The mrna codon CUU could mutate to C___ and still code for leucine, which could be a neutral mutation. What is the blank?
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A codon is a sequence of three bases found on the messenger RNA (mRNA) molecule which is translated to produce an amino acid. Each amino acid is coded by one or more specific codons. If the codon is changed through a mutation, the amino acid produced may be different. However, in this case, the other codons that produce Leucine are:

UUA, UUG, CUU, CUC, CUA and CUG

So the code CUU could mutate to CUC, CUA or CUG and leucine would still be produced.
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3 years ago
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