sequences to be added or removed, or adding a phosphate group. This represents w

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sequences to be added or removed, or adding a phosphate group. This represents why level of control of expression of genes in eukaryotes? 103. Certain forms of protein must be modified before they are functional-requini A. Pretranscriptional B. Transcriptional C. Translational ional What is crossing over? A. The exchange of genetic material between different species B. The movement of chromosomes into two cells following division C. The passage of molecules into or out of the cell D. The exchange of portions of homologous chromosomes during meiosis 104. 105. Hiow does a human eliminate the carbon dioxide produced during cellular respiration? A. CO2 is absorbed into B. CO2 is filtered out of the body by the kidneys and eliminated as urine C. CO 2 is incorporated into organic molecules within the cells D. CO2 is carried to the lungs, where it is exhaled out of the body 106. The following statements about viruses are true. Viruses are not considered to be technically alive, even though they are included in the study of biology, because they do not meet all of the accepted criteria for life. Which of the following statements would cause viruses to be considered not alive? A. Viruses can adapt and become more infectious B. Viruses contain DNA or RNA and protein C. Viruses are organized into a nucleic acid center with a protein coat D. Viruses do not take in chemical or solar energy to maintain order 107. In cells, DNA and RNA function in which capacity? A. Short-Term Energy B. Structural Support C. Long-Term Energy D. Cellular instructions 108. Many cells in your pancreas are specialized for secretion. They have many vesicles resting just beneath the surface of the plasma membrane that are filled with digestive enzymes. When the cell receives a signal, these vesicles fuse with the plasma membrane, releasing the enzyme to the cell's exterior. The cell also increases in size as the membrane from the vesicle adds to the plasma membrane. This describes which process? A. Mitosis B. Endocytosis C. Exocytosis D. Osmosis 18

Explanation / Answer

103 - post-translational modification is the process where translated proteins are phosphorylated, glycosylated, acetylated. As a result of the post-translational modification, the protein activated and can show its function or activity.

So the answer is the option D - post-translational

104- Crossing over is a process where homologous chromosomes exchange their genetic material during meiosis.

Hence answer is option D.

105 - CO2 produced during cellular respiration is first transported to the lungs with the help of blood and from there it is exhaled out from the body.

So the answer is option D.

106 - Each organism requires energy to survive. Plants get the energy from sunlight and animals gets the energy from the food that they obtain from plants. When the virus is not present in the host cells they cannot utilise the energy to survive.

So correct answer is option D.

107 - DNA and RNA contents the information that they pass. This information is utilized to carry out the cellular function.

Hence answer is the option - D. Celluar instructions

108- Cell releasees its content to the extracellular environment through the process called as exocytosis.

So answer is option C.

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