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APHY 101

College Level Anatomy and Physiology by AudioLearn

QuestionAnswer
Which cell membrane structure forms channels for ions to pass through? a. Phospholipid b. Peripheral protein c. Glycolipid d. Integral protein d. An integral protein will form a channel that allows hydrophilic (charged) ions to pass through.
Which part of the cell membrane helps identify the cell as belonging to the self? a. Phospholipid b. Glycolipid c. Protein d. Cholesterol b. It is the glycolipid portion, or the carbohydrates on a cell membrane, that help identify the cell as belonging to the self. Glycoproteins and plain carbohydrates attached to the cell membrane will also do this.
Which organelle of the cell is most associated with the genetic material in the cell? a. Endoplasmic reticulum b. Mitochondrion c. Nucleus d. Nucleolus c. Almost all of the genetic material of the cell is located in the nucleus. A small part of it is located in the mitochondria.
Which organelle helps make ribosomes involved in protein synthesis? a. Nucleolus b. Endoplasmic reticulum c. Golgi apparatus d. Peroxisome a. The nucleolus is responsible for making the ribosomes. It is located inside the nucleus and contributes to protein synthesis by sending the ribosomes to the rough endoplasmic reticulum for protein synthesis.
How many bases form a codon in the DNA sequence (in a gene)? a. two b. three c. four d. six b. A codon consists of three bases that are uniquely arranged. The different codons correlate with different amino acids that ultimately make a protein.
How many chromosomes are in nucleus of a human cell? a. 12 b. 23 c. 46 d. 64 c. There are twenty-three pairs, or a total of 46 chromosomes, in the human nucleus inside each of the cells.
How many standard amino acids are coded for by the DNA molecule? a. 15 b. 20 c. 26 d. 46 b. There are twenty amino acids that are coded for by the codons in the DNA molecule.
Which base is not seen in the RNA molecule? a. Guanine b. Cytosine c. Thymine d. Adenine c. Thymine is replaced by uracil in the RNA molecule when the transcription process occurs and DNA is transcribed into the RNA sequence.
What is the most common post-translational modification that can happen to a proprotein to make an active protein? a. Phosphorylation b. Acetylation c. Cleavage d. Disulfide bonding a. Phosphorylation of a protein strand is the most common post- translational modification that happens to a proprotein molecule before it can become a protein.
A cell that can differentiate into any type of human cell is called what? a. Hematopoietic b. Pluripotent c. Stem cell d. Totipotent d. A totipotent cell can differentiate into any cell type in the body. Only the human zygote and the first few daughter cells that come from it are truly totipotent. After the first few divisions, the cells become too differentiated and no longer totipote
Which type of cell junction allows for an epithelial cell to connect to the basal lamina of the cell? a. Gap junctions b. Hemidesmosomes c. Desmosomes d. Zonula adherens Answer: b. The hemidesmosome is made from proteins that connect the base of the epithelial cell to the basal lamina “beneath” the cell.
Which of the following is not considered connective tissue? a. Blood b. Bone c. Skin d. Cartilage Answer: c. Skin is not connective tissue; it is considered epithelial tissue.
Which type of epithelial tissue lines the alveoli of the lungs? a. Pseudostratified b. Stratified columnar c. Simple squamous d. Stratified squamous c. Simple squamous epithelium lines the alveoli of the lungs and assists with diffusion of materials from one place to another across the cells.
What is the main function of transitional epithelial tissue? a. Stretching b. Protection c. Secretion d. Absorption a. Transitional epithelial tissue allows the urinary tract tissue to stretch and be flexible.
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Created by: dgill21