Which of the following is not found in peptidoglycan?
a. N-acetylglucoasmine
b. techoic acids
c. brauns lipoprotein
d. LPS
Answer: d. LPS
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A lac Y- mutant would
A) be constitutive. B) no longer be induced by the presence of lactose. C) not have ?-galatosidase activity. D) transport lactose into the cell effectively. E) metabolize lactose.
Buchnera aphidicola provides ________ to its aphid host that are essential to the survival of the insect.
A. carbohydrates B. cellulases C. vitamins D. amino acids
During which stage of Meiosis will the chromosomes condense?
a. Telophase I b. Metaphase I c. Anaphase I d. Metaphase II e. Prophase I
Which statement is not true about the rod cells? a. Detect dim light
b. Least abundant photoreceptor. c. Contain the pigment rhodopsin. d. Respond to changes in light intensity. e. Most abundant photoreceptor.