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marin [14]
3 years ago
6

Which part of the eye is the opening through which light initially passes?

Biology
1 answer:
Alex Ar [27]3 years ago
5 0

Answer:

the pupil is the correct answer please mark as brainliest

Explanation:

The pupil is the small opening in the center of the iris through which light initially passes.

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How is the sun affecting the dead sea​
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1. Describe the structure and function of each of the three types of RNA.
Ket [755]

Answer:

1.

mRNA - Messenger RNA: Encodes amino acid sequence of a polypeptide.

tRNA - Transfer RNA: Brings amino acids to ribosomes during translation.

rRNA - Ribosomal RNA: With ribosomal proteins, makes up the ribosomes, the organelles that translate the mRNA.

2.

Transcription is the process by which DNA is copied (transcribed) to mRNA, which carries the information needed for protein synthesis. Transcription takes place in two broad steps. First, pre-messenger RNA is formed, with the involvement of RNA polymerase enzymes.

3.

During translation, which is the second major step in gene expression, the mRNA is "read" according to the genetic code, which relates the DNA sequence to the amino acid sequence in proteins. Each group of three bases in mRNA constitutes a codon, and each codon specifies a particular amino acid (hence, it is a triplet code). The mRNA sequence is thus used as a template to assemble—in order—the chain of amino acids that form a protein.

Explanation:

6 0
3 years ago
What variable influence the process of fermentation? A. Like aerobic cellular respiration, fermentation produces ATP molecules.
Dmitriy789 [7]

Answer:B

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Its the extraction of energy from carbohydrates in the absence of oxygen.a metabolic process that produces chemical changes in organic substrates through the action of enzymes.

6 0
3 years ago
Which descriptions apply to a chloroplast?
jenyasd209 [6]

Answer: (A) a membrane‑bound organelle with stacks of thylakoid discs called grana.

(E) the main site of photosynthesis in a plant cell.

Explanation:

The plant chloroplast is a large organelle, it is bounded by a double membrane like structure that is chloroplast envelop.

The chloroplast consists of chlorophyll pigment which traps the light energy from sun and converts it into chemical energy in the form of ATP. Thus the chloroplast is the main site for photosynthesis. Including the inner and outer membrane structure it also posses the third internal membrane structure which is called as the thylakoid membrane. The thylakoid membrane forms the network of flat discs which are called as thylakoids, the thylakoids are arranged in stacks which are called as grana.

The thylakoid membrane is the center point for the synthesis of ATP through a chemiosmotic process.  

4 0
3 years ago
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