Which autosomal dominant genetic trait associated with a gene on human chromosome 4 leads to a type of dwarfing due to defective cartilage formation?

a. achondroplasia
b. sickle cell anemia
c. Duchenne muscular dystrophy
d. phenylketonuria


Ans: a. achondroplasia

Biology & Microbiology

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The transformation of humans from hunter-gatherer societies to agriculturally based ones occurred approximately

____.

a. 14,000 years ago b. 11,000 years ago c. 7,000 years ago d. 1,500 years ago e. 200 years ago

Biology & Microbiology

All of the following are functions of integral membrane proteins EXCEPT ____

a. transport of polar molecules b. reception of chemical signals form other cells c. cell division d. recognition of other cells as being "like" e. cell-cell binding

Biology & Microbiology

Many organisms grow in areas where sun and nutrition sources are poor, such as the hydrothermal vents at the bottom of the ocean. By what process do these organisms make their own food?

a. photoautotrophy b. diffusion c. chemoautotrophy d. predation

Biology & Microbiology

Photosynthetic organisms convert the energy of ______ into chemical energy.

a) Electrons b) Protons c) Photons d) Hydrogen atoms

Biology & Microbiology