An electron carrier is a molecule that transports electrons during cellular respiration. ... The energy stored in NADH + H+ and FADH2 will be released later in cellular respiration to generate ATP, which can be used as an energy source throughout the cell.
        
             
        
        
        
Answer:
They produce or process nutrients in the digestive tracts of humans and other animals.
Explanation:
 
        
             
        
        
        
Answer:
1. Supplying
2. Taking 
Explanation:
Food chain is a linear relationship between organisms that depicts the flow of energy from one organism to another. In a food chain, organisms are arranged in trophic levels where arrows pointing to the right direction (➡) are used to show that the organim the arrow is pointing to eats the organism behind it. 
Hence, according to this question, arrows in a food chain point from the organism SUPPLYING the energy to the organism TAKING the energy. 
 
        
             
        
        
        
Plants store their sugar in the form of starch
        
             
        
        
        
DNA (or deoxyribonucleic acid) is the molecule that carries the genetic information in all cellular forms of life and some viruses.  Source-
 DNA, Genes and Chromosomes — University of Leicester
www2.le.ac.uk/projects/vgec/highereducation/topics/dna-genes-chromosomes