Posted: June 15th, 2022

MD University College BIO 103 – Bone cells, muscle cells, and skin cells look different

22. Bone cells, muscle cells, and skin cells look different because A) different kinds of genes are present in each kind of cell B) they are present in different organs C) different genes are active in each kind of cell D) different mutations have occurred in each kind of cell23. The replication of DNA ___________________________________________.A) produces RNA molecules B) produces completely new strands of DNA C) produces two DNA molecules, each of which is half-“new” and half-“old” DNA D) generates excessive DNA, which eventually causes the nucleus to divide24. The form of RNA that is complementary to DNA and carries the code from the DNA to the site where the protein is synthesized isA) messenger RNA B) nuclear RNA C) ribosomal RNA D) transfer RNA25. The replication of the HIV genome isA) Highly conservedB) Not highly conserved because the DNA genome is unstableC) Not highly conserved because the RNA genome is unstableD) The reverse transcriptase does not have high fidelity in replicationE) The DNA polymerase does not have high fidelity in replication26. In humans, the allele for dimples (D) is dominant.The allele for not having dimples (d) is recessive. If a woman (DD) and a man (Dd) have four children, how many of the children will not have dimples? A) 0 B) 1 C) 2 D) 3 E) 427. Which of these statements best explains how genes and proteins are related?A) Genes are segments of DNA that code for proteins.B) Proteins are segments of DNA that code for genes.C) Genes are segments of proteins that code for DNA.D) Proteins are the building blocks of genes.E) Genes are the building blocks of proteins.28. The regulation of gene expression must be more complex in multicellular eukaryotes than in prokaryotes because A) eukaryotic cells are much smaller B) in a multicellular eukaryote, different cells are specialized for different functions C) prokaryotes are restricted to stable environments D) eukaryotes have fewer genes than prokaryotes29. In Lab 6, colonies appeared on your agar plates. To identify what microbe it is one can perform which of the following? A) Mendelian genetics B) Color of the colonies C) PCR D) All of the above E) None of the above30. Researchers are studying slider turtles. Slider turtles hatch on the beach and travel to the sea. The researchers discover that the larger baby turtles were more likely to survive than the smaller baby turtles. They hypothesized that the larger turtles could move more quickly toward the water than the smaller turtles, and therefore, the larger turtles reduced their exposure to predators. The survival advantage for the larger baby turtles is a result of ______.A) natural selection B) genetic engineering C) diversity D) artificial selectionE) migration31. The theory of natural selection states thatA) some live and some die in each generation.B) only the largest and strongest survive.C) random assortment of genes results in better characteristics in the following generations.D) the best adapted individuals survive and reproduce, contributing the most genes to the next generation.E) individuals that mutate in response to their environment will survive.

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