In a nucleotide, the pho'sphate is attached to the ____________ carbon of the sugar, and the base is attached to the ____________ carbon of the sugar
A. 1'; 5'
B. 2'; 3'
C. 3'; 5'
D. 5'; 1'
E. 5'; 3'
Answer D
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At one end of a tRNA molecule is a sequence of 3 nucleotides called an anticodon that ____
a. signals the production of a ribosome b. signals the unwinding of the DNA coils c. initiates the movement of mRNA out of the cell nucleus and into the cytoplasm d. binds to its anti-complementary tRNA codon e. binds to its complementary mRNA codon
What is the correct order of these mitotic events?
A Chromosomes align on the midplate of the cell. B Kinetochores begin attaching to spindle fibers. C Nuclear membrane reforms and chromosomes decondense. D Chromosomes condense and centrosomes migrate to opposite sides of nucleus. E Sister chromatids separate and move to opposite poles. A) BDACE B) DABEC C) DBAEC D) ABDCE E) EDBAC
According to the figure, what is the only hormone that doesn't peak during ovulation?
A. progesterone
B. FSH
C. LH
D. estrogen
E. all female reproductive hormones peak at ovulation
The following items are organelles found in animal cells
Respond to statements 100–108 with reference to these organelles. a. ribosome b. mitochondrion c. lysosome d. Golgi body e. endoplasmic reticulum E 100. This organelle is the site of polypeptide assembly. M 101. The cellular digestion and disposal of biological molecules occurs inside this organelle. M 102. Aerobic respiration occurs in this organelle. M 103. RNA carries out the genetic code translation process in association with ribosomes on this organelle. Chapter 4 Cell Structure and Function 11 M 104. The packaging of secretory proteins occurs in association with this structure. M 105. This organelle is involved in lipid production and protein transport. E 106. Proteins are synthesized on this tiny, two-part organelle. E 107. Sugar metabolism occurs in association with this organelle. D 108. DNA synthesis occurs in the nucleus. Its breakdown can occur in this organelle.