Mycoplasma tuberculosis, the causative agent in tuberculosis, primarily infects the alveolar macrophages and is therefore very fortunate in its size. why is this statement true? a. a facultative primary pathogen. b. a facultative opportunistic pathogen. c. an obligate primary pathogen. d. an obligate opportunistic pathogen.

d. an obligate opportunistic pathogen.

Explanation:

Mycobacterium tuberculosis is a rod shaped bacterium which causes tuberculosis. Most of the pathogenic bacteria are obligatory pathogen. It is airborne bacterium which is efficiently spread from person to person through droplet nuclei reach the terminal air-spaces. From air space the mycobacterium ingested by alveolar macrophages and then carried by lymphatics to regional lymph nodes. It is very small and does not get caught in the mucociliary ladder and it is enough large to be immediately exhaled, so, they lands in the alveoli. Thus, it is an opportunistic obligate pathogen.

fertilization, pictured in figure 24.23a is the process in which gametes (an egg and sperm) fuse to form a zygote. the egg and sperm each contain one set of chromosomes. to ensure that the offspring has only one complete diploid set of chromosomes, only one sperm must fuse with one egg. in mammals, the egg is protected by a layer of extracellular matrix consisting mainly of glycoproteins called the zona pellucida. when a sperm binds to the zona pellucida, a series of biochemical events, called the acrosomal reactions, take place. in placental mammals, the acrosome contains digestive enzymes that initiate the degradation of the glycoprotein matrix protecting the egg and allowing the sperm plasma membrane to fuse with the egg plasma membrane, as illustrated in figure 24.23b. the fusion of these two membranes creates an opening through which the sperm nucleus is transferred into the ovum. the nuclear membranes of the egg and sperm break down and the two haploid genomes condense to form a diploid genome.

explanation:

1. what is the relationship between the shape of an enzyme and the reactions they catalyze?

2. how does an enzyme inhibitor work?

separate your answers so i dont get confused : )