Which organelle contains cristae where enzymes and electron carriers for aerobic respiration are found?
A. Lysosome
B. Chloroplast
C. Mitochondrion
D. Golgi apparatus
E. Endoplasmic reticulum
Answer: C
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The size of the mouse (M. musculus) genome is 2700 megabases (Mb) and it contains about 25,000 genes arranged on 40 chromosomes. If the genes are evenly distributed on chromosomes in the mouse, what is the average number of genes per chromosome?
A) 1 B) 9.3 C) 67.5 D) 625
Positional cloning
A) seeks regions of the genome shared by the members of large families who have the same Mendelian disorder. B) scans and then sequences the human genome chromosome by chromosome, in size order. C) determines the sequence of protein-encoding genes on a chromosome. D) identifies expressed sequence tags in genes of interest.
A student encounters a pondweed which appears to be a charophyte (stonewort). Which of the following features would help the student determine whether the sample comes from a charophyte or from some other type of green alga?
1. molecular structure of enzymes inside the chloroplasts 2. structure of sperm cells 3. presence of phragmoplasts 4. rings of cellulose-synthesizing complexes A) 1 and 3 B) 1 and 4 C) 2 and 3 D) 2, 3, and 4
Alternate forms of the same gene
a)do not exist. b)are alleles. c)are homologs. d)are sister chromatids. e)do not occur in the same individual.