Which cell structures are sometimes found attached to the endoplasmic reticulum

Answers

Answer 1

Answer: Ribosomes.
The outer face of RER ( rough endoplasmic reticulum) is studded with Ribosomes.

Related Questions

Which of the following is NOT true about male condoms?A. They can be washed and reused B. Their usage requires planning ahead and good communication between partners. C. They are effective at preventing the transmission of STDs. D. They are readily available without a prescription,=.
Which of the following describes why wetlands are important to the water cycle?
If a rock disintegrates by chemical weathering into small grains of similar composition, would this be considered reproduction?
What is adaptation in animals and plants
Washing your hands frequently can prevent the spread of many vectors. True or false

Characteristics of animal cells include which of the following? Select all that apply. no cell wall, only plasma membrane

large hypertonic vacuole

no chlorophyll or chloroplasts

cell plate in cell division

cleavage furrow

Answers

Primarily, the properties exhibited by animal cells are:
No cell wall, only plasma membrane (cell walls are a property of plant cells)
No chlorophyll or chloroplasts (animals do not photosynthesize so do not have these organelles)
Cleavage furrow (exhibited during cell replication)

Answer:

no cell wall, only plasma membrane

cleavage furrow

Explanation:

The animal cells are different from the plant cells in many ways. The specific characteristic features of the animal cell include the absence of the cell wall, and the formation of the cleavage furrow during the cell division.

The animal cells only have plasma membrane around them. No large hypertonic vacuole is present. The chlorophyll and chloroplasts are present in the plant cells and not in the animal cells. The cell plate is formed in the plant cells during the cell division. In the animals, a cleavage furrow is formed instead of the cell plate.

Photosynthesis can be modeled by its overall chemical reaction. Which two substances are the products, or outputs, of this reaction? A. sugars and carbon dioxide B. carbon dioxide and water C. carbon dioxide and oxygen D. sugars and oxygen

Answers

Answer:

Sugar and oxygen.

Explanation:

Sugar is the main product of Calvin cycle while oxygen is the by product of the process.

The sugar is obtained as 6-C compounds by reduction of Cabondioxide with Hydrogen ions obtained from the photolysis of water, in the light dependent stage. Thus the production Sugar takes place in the light -independent state.

The Oxygen is produced during photolysis splitting of water to H+ + e- + O- at the light dependent stage. This is the basic reaction of Light dependent stage.

The Hyrogen is used for CO2 as mentioned above , while the O2 liberated for cellular respiration as by product.

An mRNA is 429 nucleotides long. The number of amino acids in the polypeptide chain formed from this mRNA is(A) 143.
(B) 142.
(C) 141.
(D) 429.
(E) 428.

Answers

B. 142. This is because one of the molecules has to be a stop codon which doesn't code for an amino acid. So there are only 426 nucleotides coding for the polypeptide chain. It takes 3 nucleotides to code for an amino acid. So 426 divided by 3 is 142, which is the amount of amino acids that will be part of this chain.

Final answer:

An mRNA of 429 nucleotides will form a polypeptide chain with 143 amino acids, assuming each codon (set of 3 nucleotides) corresponds to an amino acid and the stop codon is not counted.

Explanation:

For the synthesis of protein in a process known as translation, each triplet set of nucleotides in the mRNA, called a codon, identifies a specific amino acid. Hence, an mRNA of 429 nucleotides would be segmented into a set of 3 to form the different codons for the amino acids. Since 429 divided by 3 is 143, the polypeptide chain resulting from this mRNA would have 143 amino acids.

In this case, the correct answer would be (A) 143. This calculation does not take into account the stop codon that does not correspond to an amino acid, but usually examination questions ignore the effect of the stop codon. To provide the most accurate answer, we would need to know if the mRNA sequence includes the stop codon or not.