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Debora [2.8K]
2 years ago
7

17. When transcription occurs in eukaryotic cells, a DNA strand is copied to an mRNA strand that contains introns and exons. Whi

ch of the two is needed for the
production of proteins, and why?
Exons because they are coding sequences.
Introns because they are non-coding sequences.
Introns because they are coding sequences.
Exons because they are non-coding sequences
Biology
1 answer:
scoundrel [369]2 years ago
6 0

Answer:

Exons because they are coding sequences

Explanation:

The sections of DNA (or RNA) that code for proteins are called exons.

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Asap plzzzz help I will give brainliest​
g100num [7]

Answer:

The first letter of after replication

Explanation:

Everything else is the same except for the first letter

Hope this helps :)

3 0
3 years ago
If you could monitor the activity from the photoreceptors of rods and cones in the retina during a dream, would you expect these
loris [4]

The question is incomplete as it does not have the options which are:

- Yes, because people's eyes move during sleep, and this stimulates the rods and cones.

- No, because rods and cones only convert light energy into electrical signals.

- No, because rods and cones never produce electrical signals.

- Yes, because the rods and cones are reproducing images that are then sent to the brain.

Answer:

No, because rods and cones only convert light energy into electrical signals.

Explanation:

The rod and cone cells are the photoreceptor cells present on the retina of the eye which receives the physical stimulus in the form of light and then converts the light energy into the electrical energy which is sent to the brain.

When we dream, our remains closed and no light is able to enter the eye as a result of which the rods and cones do not send the signals to the brain.

Thus, the selected options are correct.

4 0
3 years ago
Suppose that a dominant allele (P) codes for a polka-dot tail and a recessive allele (p) codes for a solid colored tail. If two
andrew11 [14]
The correct answer is B. The parents are heterozygous with polka-dot tails, so they both have Pp genotype. The combination of their genotypes (Pp x Pp) could produce 4 genotypes PP, Pp, Pp and pp. Therefore, there is 25% chance for a PP genotype, 25% for a pp genotype and 50% for a Pp genotype. The PP and Pp genotypes produce a polka-dot tail phenotype and the pp genotype produces a solid coloured tail phenotype. In conclusion, there is 75% chance for a polka-dot tail (25% for a PP + 50% for a Pp) and a 25% for a solid coloured tail phenotype (25% for a pp).
3 0
3 years ago
List all organelles that are found suspended or cushioned in the cytoplasm of an animal cell. There are 15 total
DIA [1.3K]

Answer:

The organelles in an animal cell are as follows:

cell membrane, nucleus, nucleolus, nuclear membrane, cytosol, smooth endoplasmic reticulum, rough endoplasmic reticulum, Golgi apparatus, ribosomes, mitochondria, centrosome, cytoskeleton, vacuoles, vesicles, and lysosomes.

Explanation:

An animal cell is a typical example of an eukaryotic cell i.e a cell that contains a membrane-bound nucleus. In the cell are certain structures that performs specific functions in the cell called ORGANELLES. The organelles, according to this question, are found suspended or cushioned in the cytoplasm of the animal cell.

A list of the organelles in the cytoplasm (part of the cell that excludes the nucleus) of an animal cell are as follows:

- cell membrane

- nucleus

- nucleolus

- nuclear membrane

- cytosol

- smooth endoplasmic reticulum

- rough endoplasmic reticulum

- Golgi apparatus

- ribosomes

- mitochondria

- centrosome

- cytoskeleton

- vacuoles

- vesicles

- lysosomes

3 0
3 years ago
How many nucleotide bases differ between your sample (labeled as O. Kisutch) and the standard sequence for O. Kisutch? Sample la
OverLord2011 [107]

The right answer is 3 nucleotide bases.

5'-CGGCACCGCCCTAAGTCTCT-3'

5'-AGGCACCGCCCTAAGTCTAC-3'

It would be necessary first to align the two sequences side by side so as to be able to compare them, and they should also be in the same direction.

The nucleotides marked in bold are the nucleotides that differ between standard and O. Kisutch.

These nucleotide changes are necessarily due to substitution mutations that exchanged one nucleotide for another in the same location.

8 0
3 years ago
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