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Nimfa-mama [501]
3 years ago
9

The main difference between the four nucleotides that make up DNA is that they have differentRequired to answer. Single choice.

Biology
1 answer:
pickupchik [31]3 years ago
3 0

Answer:

bases.

Explanation:

Nucleotides are the basic building blocks that make up DNA, consisting of a deoxyribose sugar, phosphate group, and nitrogenous base. The main difference between the four nucleotides is the nitrogenous base, Adenine, Thymine, Guanine, or Cytosine. Adenine pairs with Thymine, and Guanine pairs with Cytosine. The order in which these pairs come in code for proteins and hold genetic information.

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Which is a requirement for natural selection to occur?
KIM [24]

Answer:

Fewer Offspring than the environment can support

Explanation:

It takes time for  a creature to adapt to its  Environment. So that puts off 2.

Your guaranteed to get traits from your parents so that rules out #1

There isn't really an equal probability of survival for an offspring, ruling out #3.

So that leaves us with 4. I'm not biology expert, I'm just letting you know how I did this problem.  Just in case i'm wrong, I would double check with other answers :)

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3 years ago
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Which of these is a hypothesis that can be tested through experimentation? A. Bacterial growth increases exponentially as temper
umka21 [38]
A. Bacterial growth increases exponentially as temperature increases.
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3 years ago
For this task, you will imagine that you are a reporter for a scientific magazine. Your task is to explain the process of protei
amid [387]

Answer:

Please find the explanation below

Explanation:

Our nucleus is made up of a genetic material called deoxyribonucleic acid (DNA), which is a double-helical structure that stores the genetic information needed for the optimal functioning of any organism. DNA, alongside RNA are nucleic acids that are composed of NUCLEOTIDES subunits. The nucleotide consists of a pentose sugar (deoxyribose in DNA and ribose in RNA), nitrogenous base and a phosphate group.

However, the genetic information stored in the DNA molecule needs to be expressed in order to form useful products (proteins). This genetic expression is done in two stages viz: transcription and translation. Transcription, which is catalyzed by an enzyme called RNA polymerase is the process whereby the information stored in the DNA is used to synthesize a mRNA molecule. However, this mRNA molecule is considered pre-mature until it is processed. RNA processing occurs in three stages viz: 5' capping, polyadenylation, and splicing.

5' capping involves adding a 5' cap to the marks molecule. Polyadenylation involves adding a poly(A) tail to the mRNA molecule while splicing is the removal of introns (non coding regions) with the aid of Spliceosomes and joining of the exons (coding region). After processing, the mRNA becomes matured and ready to be translated.

Translation is the process whereby the mRNA transcript is used to synthesize a protein molecule. It occurs in the ribosomes (organelles for protein synthesis, a complex of rRNA and proteins) where the mRNA is read in a group of three nucleotides called CODON. The reading is done by the Anticodon of a transfer RNA (tRNA), which is complementary to the codon.

Translation occurs in three stages: initiation, elongation and termination. The mRNA attaches to the P site of the ribosomes (initiation) where it is attached to by a tRNA's anticodon complementary to it. The anticodon carries the amino acid corresponding the codon and shifts to the A-site. The addition of amino acid to the polypeptide chain continues (elongation) until a stop codon is encountered, which signals the end of the translation process i.e. termination. This causes the polypeptide (protein) to be released from the E-site.

The synthesized protein undergoes packaging and modification in the Golgi apparatus.

5 0
3 years ago
Action potentials are normally carried in only one direction: from the axon hillock toward the axon terminals. If you experiment
Kisachek [45]

Answer:

from the axon hillock toward the axon terminals.

Explanation:

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4 0
3 years ago
Which of these limitations has the greatest impact on the European and American weather models?
igor_vitrenko [27]

Answer:

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Explanation:

3 0
3 years ago
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