Fungi spores are haploid; what distinguishes haploid spores?
A. Haploid spores have a double set of chromosomes, half the number of chromosomes of diploid organisms.
B. Like diploid organisms, haploid spores have a single set of chromosomes.
C. Haploid spores have a single set of chromosomes, half the number of chromosomes of diploid organisms.
D. Like diploid organisms, haploid spores have a double set of chromosomes.
Answer: C
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The regulatory protein
A. binds to the promoter region of DNA. B. may inhibit or enhance transcription. C. may control translation of the operon. D. affects the activity of the DNA polymerase. E. binds to the promoter region of DNA AND affects the activity of the DNA polymerase.
The electronegativity of nitrogen (N) is 3.0, while the electronegativity of hydrogen (H) is 2.1. Knowing this, consider how the electrons will be shared in ammonia (NH3 ). What do you predict about the polarity of ammonia?
A. Each H atom has a partial positive charge B. The N atom has a partial positive charge C. Each H atom has a partial negative charge D. The N atom has a strong positive charge
The results of the treatment of 20 boys with
SCID-X1 showed that a. SCID-X1 can be cured through genetic engineering. b. most of the treated boys were cured of the disease. c. a transplanted normal IL2RG gene can cure SCID-X1. d. our understanding of the human genome lags behind our ability to modify it. e. all of these are true.
What is herd immunity?
A) the protection offered to you by the size of your country, as it limits potential outside contact with an infected individual B) at least 25 percent of the population needs to be immune before those too poor to receive the vaccination can be protected C) the only protection available to those who are unable to receive immunizations due to medical reasons D) small communities protect their children from being exposed to outside pathogens by limiting the contact their children have with outside visitors or workers E) the only protection available to those who choose not to receive immunizations due to religious belief