Which of the following is false about the enzyme lysozyme?
A) can be found in mucus, saliva, tears, and breast milk
B) destroys viruses and fungi
C) acts as a chemical barrier
D) kills bacterial cells
E) breaks down bacterial cell walls
Answer: B
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All atoms tend to fill their outer energy levels with the maximum number of electrons, usually eight. Depending on whether atoms satisfy the octet rule will predict:
A. the chemical behavior of the atoms. B. whether they will be found in nature. C. whether they will dissolve in water. D. their radioactive energy.
Animals colonized land after plants did. The first land animals were _____, who first colonized land about _____ million years ago
A. insects; 575 B. hemichordates; 542 C. chelicerates; 420 D. insects; 360 E. myriapods; 100
In birds and reptiles, waste ammonia is usually converted to ____
a. uric acid b. protein c. carbohydrates d. carbon dioxide e. glucose
Which of the following is NOT true of human
chromosomes? a. The haploid number is 23. b. The diploid number is 46. c. There are 23 pairs of chromosomes. d. Human gametes end up with two of each type of 23 chromosomes. e. Human gametes end up with one of each type of 23 chromosomes.