a A 1. What are the two parts of a nucleotide that do not change throughout the structure of DNA? A. Five-carbon sugar and nitrogen base B. Five carbon sugar and phosphate group C. phosphate group and nitrogen base D. All components remain the same throughout the DNA structure, 2. What type of nitrogen base bonds with adenine? A. Cytosine B. Guanine C. Thymine D. Uracil 3. What bonds together the two strands of DNA in the middle? A. sugars C. nitrogen bases B. phosphates D. uracil Som nobis 4. If one strand of DNA had a sequence of nitrogen bases that reads ACCIGA. What will be its c A. ACCTGA C. TGGACT B. CTTGAT D. TAACCC 5. Which of the following units are repeatedly joined together to form a strand of DNA? A. amino acids C. nucleotides B. fatty acids D. polysaccharides 6. What are the two types of sex chromosomes in humans? A. X and Z C. Y and Z B. A and B D. X and Y 7. In humans, whose chromosomes determine whether a child is born male or female? A. The female C. The male's parents B. The male D. The female's parents 8. Which sex chromosome is present in both male and female? A. X chromosome C. Z chromosome B. Y chromosome D.X and Y chromosome 9. What are the "sex chromosomes?" A The chromosomes that determine whether a person will be male or female. B. it refers to a body chromosome C. The best looking of all the chromosomes, also known as the "sexy chromosome." D. None of the above 10. How is sex determined and inherited in humans? A. by a pair of sex chromosomes: XX in males and females B. by a pair of sex chromosomes: XY in males and XX in females C. by a set of XYZ chromosome D. through a body chromosome​