Why is nitrogen necessary in the human body?
What will be an ideal response?
ANSWER: Nitrogen is required in order for the body to produce proteins, nucleic acids, and other
biological molecules. It is one of the nutrients necessary for life.
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The poly(A) tail of an mRNA ____
a. is where the start codon is located b. covers the stop codon until it is needed c. protects the mRNA from attack by RNA-digesting enzymes d. is where ribosomes attach at the start of translation e. is where translation terminates
Which of the following joint types is not correctly matched with its example?
A. Combination joint-knee joint B. Ball-and-socket joint-femur and pelvis C. Hinge joint-finger joint D. Gliding joint-vertebral column E. Immovable joint-skull sutures
In Drosophila, the allele red eyes (bw+) is dominant to the allele for brown eyes (bw). At another gene locus on the same chromosome, the allele for thin wing veins (hv+) is dominant to the allele for heavy wing veins (hv). Flies homozygous for bw and hv+ are crossed to flies homozygous for bw+ and hv to obtain doubly heterozygous F1 progeny.What would be the results of a test cross with the F1 flies?
A. 1 brown eye, heavy wing veins: 1 red eye, thin wing veins B. 1 brown eye, heavy wing veins: 2 red eye, thin wing veins: 1 red eye, thin wing veins C. 1 brown eye, thin wing veins: 2 red eye, thin wing veins: 1 red eye, heavy wing veins D. 1 brown eye, thin wing veins: 1 red eye, heavy wing veins
Which of the following bacterial genera is useful for the degradation of environmental pollutants?
A. Actinomyces B. Streptomyces C. Corynebacterium D. Rhizobium E. Nocardia