The answer is d. chromosomes help an organism produce usable energy
        
                    
             
        
        
        
The answer would be:
DNA : A A T T G C 
mRNA: U U A A C G 
The base pairings in mRNA is essentially the same, T to A, G to C however, uracil with substitute thymine to pair up with an Adenine base. In summary:
G to C C to G
A to U T to A
 
        
                    
             
        
        
        
Hello There!
<span>Mendel believed that during the formation of gametes, the pair of genes controlling a trait separate. He called this the principle of segregation.
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Hope This Helps You!
Good Luck :) 
- Hannah ❤
        
                    
             
        
        
        
it’s c, i’m trying to answer my first question 
 
        
                    
             
        
        
        
Answer:
D
Explanation:
nitrogenous base, 5-carbon sugar, phosphate group