A structural molecule found in eukaryotic cytoskeletons, but NOT flagella, cilia, and centrioles is (actin/flagellin/tubulin).
Fill in the blank(s) with the appropriate word(s).
tubulin
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In pea plants, the allele for round peas (R) is dominant to the allele for wrinkled peas (r). A gardener has a plant that his neighbor gave him that produces round peas, but he does not know its genotype. What simple procedure could he do to determine the genotype of his new plant?
a. Perform a dihybrid cross—if only 1 out of 16 offspring are wrinkled, then the new plant’s genotype is RR. b. Perform a test cross with a plant that has wrinkled peas—if any offspring give wrinkled peas, then the new plant’s genotype is Rr. c. Perform a test cross with a plant that has an Rr genotype—if all of the offspring give round seeds, then the new plant’s genotype is Rr. d. Perform a monohybrid cross—if any offspring give round peas, then the new plant’s genotype is RR.
Which of the following accurately describes the structure of fibrous proteins?
A) Fibrous proteins usually contain a number of different domains with different structural motifs. B) Fibrous proteins are composed of an equal mixture of ? helices and ? sheets with interconnecting looped segments. C) Fibrous proteins have an extensive tertiary and quaternary structure that affects the strength and elasticity of each fiber. D) Fibrous proteins have a simple primary structure and very little secondary structure, resulting in long, thin fibers. E) Fibrous proteins are usually composed of either ? helices or ? sheets throughout the molecule, giving them a highly ordered, repetitive structure.
Just before entering the small intestine, what is the pH of chyme?
A) very basic (very high pH) B) slightly basic (high pH) C) neutral (pH near 7) D) acidic (low pH)
Each nucleus is haploid in dikaryotic cells in certain fungi. What does this mean regarding the chromosomes in each nucleus?
What will be an ideal response?