Which of the following plant organelle is a colorless plastid that stores starch in roots?

A. thyloplasts
B. chloroplasts
C. chromoplasts
D. amyloplasts
E. both chloroplasts and chromoplasts


D. amyloplasts

Biology & Microbiology

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Which of the following is an intermediate in the reaction that forms Ala-tRNA?

A. Alanyl-ATP B. Alanyl-ADP C. Alanyl-PPi D. Alanyl-AMP

Biology & Microbiology

Which of the following macromolecules is insoluble in water?

A) lipids B) sugars C) amino acids D) disaccharides E) nucleic acids

Biology & Microbiology

In addition to several other factors, the overall risks of environmental chemicals depend on genetically determined

variations in the ____ involved in transport, metabolism, and excretion of these chemicals. a. proteins b. body’s oxygen levels c. body’s pH d. ribosomes e. disaccharides

Biology & Microbiology

The main weight-bearing bone in the lower extremities is known as the ________

A) fibula B) tibia C) pelvis D) femur

Biology & Microbiology