Practice Questions

TLS Online TPP Program

#Question id: 3530

Mendel’s law of segregation, as applied to the behavior of chromosomes in meiosis, means that:

#Section 3: Genetics, Cellular and Molecular Biology

pairing of homologs will convert one allele into the other, leading to separation of the types.
alleles of a gene separate from each other when homologs separate in meiosis I, or in meiosis II if there is a single crossover between the gene and the centromere.
genes on the same chromosome will show 50% recombination
alleles of a gene will be linked and passed on together through meiosis

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TLS Online TPP Program

#Question id: 1121

#Section 3: Genetics, Cellular and Molecular Biology

Which of the following provides the best evidence that cell-signaling pathways evolved early in the history of life?

TLS Online TPP Program

#Question id: 1122

#Section 3: Genetics, Cellular and Molecular Biology

In endocrine signaling, the signaling molecule.

TLS Online TPP Program

#Question id: 1123

#Section 3: Genetics, Cellular and Molecular Biology

Epinephrine can be what kind of signaling molecule?

a. autocrine b. direct contact c. endocrine d. paracrine

TLS Online TPP Program

#Question id: 1124

#Section 3: Genetics, Cellular and Molecular Biology

Which of the following is (are) intracellular second messengers?

a. Ca2+ b. cAMP c. epinephrine

d. protein kinase A e. protein kinase C

TLS Online TPP Program

#Question id: 1125

#Section 3: Genetics, Cellular and Molecular Biology

Examples of G protein–coupled receptors include

a. rhodopsin receptor. b. β-adrenergic receptor.

c. insulin receptor. d. acetylcholine receptor.

TLS Online TPP Program

#Question id: 1126

#Section 3: Genetics, Cellular and Molecular Biology

Which of the following statement(s) is (are) true of the α subunit of a G protein?

a. It physically associates with the receptor.

b. It binds GDP.

c. It binds GTP.

d. It is a transmembrane protein.