The peptidoglycan of bacterial cell walls contains a carbohydrate matrix linked together by short chains of:
A. fatty acids.
B. steroids.
C. nucleotides.
D. amino acids.
E. water molecules.
D
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Answer the following statements true (T) or false (F)
1. Apoptosis through the extrinsic pathway is activated by factors such as lack of oxygen or growth factors. 2. Apoptosis is used in humans in order to eliminate cells infected by viruses, cells that are worn out, and those that have the potential to cause cancer. 3. Ligands that promote cell death are typically found on the surface of cells of the immune system that recognize abnormal cells and target them for destruction. 4. The most prominent tissue type present in plants is the dermis.
A plant species where each plant makes some flowers that are male and some that are female is called a ____ species and always has ____ flowers
a. monoecious; complete b. dioecious; imperfect c. dioecious; complete d. monoecious; imperfect e. monoecious; perfect
The nucleosome core particle is composed of ____
a. DNA b. helicase c. single-stranded binding proteins d. RNA primer e. histones
Face length in dogs is controlled by ____
a. a dozen alleles b. a dozen genes c. multiple chromosomes d. sex-linked alleles e. trisomies