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58 | | Cilia and flagella are distinguished from each other on the basis of |
| | A) | width and numbers |
| | B) | length and numbers |
| | C) | depth and numbers |
| | D) | length and width |
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59 | | The building blocks of DNA and RNA found in the nucleus of the cell are known as the |
| | A) | monosaccharides |
| | B) | nucleotides |
| | C) | amino acids |
| | D) | triglycerides |
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60 | | The "control center" of the cell is the |
| | A) | nucleus |
| | B) | ribosome |
| | C) | mitochondrion |
| | D) | plasma membrane |
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61 | | The structure of the nucleus can be described as |
| | A) | enclosed in a cell membrane |
| | B) | enclosed in a nuclear envelope |
| | C) | composed of cytoplasm |
| | D) | composed of cytoplasmic organelles |
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62 | | In the nucleus, DNA is wrapped within proteins. This structure is known as |
| | A) | chromatin |
| | B) | cytoplasmic organelles |
| | C) | DNA molecules |
| | D) | nucleoli |
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63 | | One function of a nucleus in the cell is to |
| | A) | digest lipids |
| | B) | produce ATP |
| | C) | produce secretory vesicles |
| | D) | control and coordinate cellular activities |
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64 | | Elements present in DNA and RNA are |
| | A) | C, H, O |
| | B) | C, H, O, N, S |
| | C) | C, H, O, N, P |
| | D) | O, H, N, P, S |
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65 | | DNA is condensed to form a structure called a _________ in the nucleus. |
| | A) | RNA |
| | B) | cytosol |
| | C) | gene |
| | D) | chromosome |
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66 | | Nucleoli |
| | A) | are located in the cytoplasm |
| | B) | produce ribosomal subunits |
| | C) | have a distinct membrane |
| | D) | are important for the formation of the Golgi apparatus |
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67 | | Which of the following correctly matches a nuclear structure with its function? |
| | A) | chromosomes - contains RNA and histones |
| | B) | nuclear envelope - contains the nucleolar organizer |
| | C) | nuclear pores - allow molecules to move between the nucleus and cytoplasm |
| | D) | chromatin - fluid portion of the nucleus |
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68 | | Arrange the following in correct sequence:
- Polypeptide chains move through rough ER and then carried in vesicles to Golgi Apparatus.
- Vesicles are pinched off from Golgi Apparatus carrying newly formed proteins to plasma membrane.
- Golgi Apparatus separates and modifies varieties of proteins and then packages them into vesicles.
- Initiated by RNA, polypeptide chains are made by ribosomes on rough ER.
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| | A) | 1, 2, 3, 4 |
| | B) | 4, 1, 3, 2 |
| | C) | 2, 3, 1, 4 |
| | D) | 3, 2, 4, 1 |
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69 | | The transfer of information from DNA to messenger RNA (m-RNA) is known as |
| | A) | transduction |
| | B) | translocation |
| | C) | translation |
| | D) | transcription |
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70 | | If an m-RNA molecule is 2400 nucleotides (bases) in length, this molecule will contain _______ codons. |
| | A) | 800 |
| | B) | 600 |
| | C) | 1200 |
| | D) | 2400 |
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71 | | Which of the following molecules contains the anticodon? |
| | A) | m-RNA |
| | B) | r-RNA |
| | C) | t-RNA |
| | D) | DNA |
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72 | | The process of DNA replication is |
| | A) | semiconservative in nature |
| | B) | known as translation |
| | C) | semipermeable in nature |
| | D) | sequencing of codons in RNA |
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73 | | DNA replication results in two new DNA molecules. Each of these new molecules has |
| | A) | two newly synthesized strands of nucleotides |
| | B) | one strand of nucleotides from the parent DNA and one newly synthesized strand of nucleotides |
| | C) | two strands of nucleotides from the parent |
| | D) | two strands of nucleotides from the parent RNA |
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