DNA is a double-stranded, helical molecule composed of nucleotides, each of which contains a phosphate group, a sugar molecule, and a nitrogenous base. ... As the DNA polymerase moves down the single-stranded DNA, it uses the sequence of nucleotides in that strand as a template for replication.
B. winter; summer
When the Southern Hemisphere is titled towards the sun, it is getting more sunlight than anywhere else, and so it is also warmer. This is summer.
Since the Northern Hemisphere is the opposite of the Southern Hemisphere, it is tilted away from the sun, receiving less sunlight, making it winter.
B.
Plants use light energy to produce food molecules during photosynthesis and obtain cellular energy from the bonds of these food molecules during cellular respiration.
The chlorophyll pigment in plants harnesses light energy to ‘manufacture’ glucose/carbohydrates which are later used by the plant for cellular respiration to power cell activities.
Explanation:
The energy from sunlight is used by the chlorophyll pigments to make ATPs through a process called photophosphorylation. In addition, the light energy is used to split water molecules into H⁺ and O²⁻. The H⁺ is then captured by NADP+ which is reduced to NADPH, while O²⁻ is evolved as oxygen. This occurs in the light stage of photosynthesis.
The NADPH is used to reduce carbon dioxide into glucose in the dark stage (Calvin cycle) of photosynthesis. Remember since this is an anabolic process ATPs (the one created through photophosphorylation) are used to power this cycle.
Excess glucose can be converted to starch and stored. Otherwise, the energy captured in the chemical bonds of the glucose are again utilized to make ATPs in cellular respiration.
Learn More:
For more on photosynthesis check out;
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Answer:
See explanation section
Explanation:
Though The first Homo Sapiens were born about 200,000 years ago, the modern man left Africa 60,000 years ago to penetrate every corner of the world. It is hard to find that the distance and time of their travel. According to the anthropologist and paleontologist, the human took nearly six hundred generations to leave their African homeland to settle the world. It is also known as ‘’The great human migration’’.
Here is the source: The Genographic Project, National Geographic Smithsonian Magazine, University of Oxford.
Answer: a molecule made of many small molecules
Explanation: Macromolecules are large molecules that are composed of smaller molecules called monomers. These macromolecules are polymers of the monomers units. Examples of macromolecules are proteins which have amino acids as their monomers and carbohydrates which have monosaccharide sugars such as glucose, and fructose as the monomers.