phloem
parenchyma
none of the above
Both of the original DNA strands act as templates during replication.
Only one of the original DNA strands acts as a template during replication.
DNA replication takes place in the cytosol of cells.
Answer:
Only one of the original DNA strands acts as a template during replication.
Explanation:
The DNA of every living cell replicates prior to division. It occurs in the S-phase of interphase stage. The DNA is a long double-helical structure. Before the actual duplication occurs, the double strand of the DNA needs to be unwound. This unwinding is done by HELICASE by breaking the weak hydrogen bonds that binds each base pair.
After the unwinding, two separate strands result with only one of the strands serving as a template for the new strand synthesized by DNA polymerase. DNA polymerase enzyme synthesizes new DNA strand by adding nucleotide bases that are complementary to each template strand.
i.e. DNA polymerase will add nucleotide G to the growing strand if it reads nucleotide C on the template strand.
Answer:
The correct answer would be "Photosynthesis produces oxygen, while cellular respiration produces carbon dioxide"
Photosynthesis refers to the process by which plants make their food (sugars or glucose) from carbon dioxide and water with the help of sunlight and chlorophyll.
It takes place in chloroplast of the cell. Oxygen is released as the byproduct of the process.
The whole reaction can be summarized as:
6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂
In contrast, cellular respiration refers to the set of chemical reactions which take place in the cell in order to convert the chemical energy of the food (sugar) into ATP.
Carbon dioxide is released as the byproduct.
The whole reaction can be summarized as
C₆H₁₂O₆ + 6O₂ → 6CO₂ + 6H₂O
muscles
fluids
bones
Answer:
The correct answer would be bones.
X-rays are high energy electromagnetic waves which have an ability to penetrate most of the biological tissues.
In the X-ray machine, a beam of high energy X-rays is passed through the filters and subject and then fall on the detector or photographic film to produce X-ray.
Dense tissues like bone, teeth, tumors et cetera blocks or stops most of the X-ray particles from reaching the detector or photographic film.
It forms glowing pictures on the X-ray film or photographic film.
The denser the material the brighter the image will be formed on the photographic film.
buffer
substrate
The right answer is the catalyst.
In chemistry, a catalyst is a substance that increases the rate of a chemical reaction; it participates in the reaction but it is neither part of the products nor reagents and therefore does not appear in the equation-balance of this reaction.
The catalyst accelerates, sometimes in considerable proportions, the chemical reaction, but it is not consumed: either it does not participate in the reaction but its presence facilitates the breakage of the bonds, or it participates but is regenerated at the end.
Catalysts are widely used in industry and laboratory.
In nature and in biochemistry, some proteins have catalytic activity. They are enzymes.