Bio 175 Lecture: Chapters 1-5

Which structures are fingerlike projections that greatly increase the absorbing surface of cells?

Which of the following is not a function of lysosomes? a. digesting particles taken in by endocytosis b. breaking down bone to release calcium ions into the blood c. are responsible for the synthesis of free radical scavenging system d. degrading worn-out or nonfunctional organelles e. forming acid hydrolases which are necessary to help form cell membranes

The correct sequence of events in the Mitotic phase of the cell cycle is:

This is a measure of a solutions ability to change the volume of cells by altering their water content

The functions of centrioles include ________.

In which stage of mitosis do the identical sets of chromosomes uncoil and resume their chromatin form?

Once solid material is phagocytized and taken into a vacuole, which of the following statements best describes what happens? a. A lysosome combines with the vacuole and digests the enclosed solid material. b. The vacuole remains separated from the cytoplasm and the solid material persists unchanged. c. The secondary lysosome transforms into a primary lysosome and releases its phagocytic contents into the cell d. The phagocytized material is stored until further breakdown can occur. e. A ribosome enters the vacuole and uses the amino acids in the "invader" to form new protein.

The main component of the cytosol is ________.

The actual formation of a protein (protein synthesis) within the ribosome occurs where in the cell?

If a tRNA had an AGC anticodon, it could attach to a(n) ________ mRNA codon.

Diffusion can be defined as the net movement of material from an area of________

A red blood cell placed in pure water would ________.

Passive membrane transport processes include ________.

A gene can best be defined as ________.

The RNA responsible for bringing the amino acids to the ribosome for protein formation is ________.

What phenomenon occurs in Metaphase:

When a simple sugar like glucose is entering the intestinal epithelia from the lumen of the small intestine, the following biochemical process is observed:

Which of the following is not a function of the smooth endoplasmic reticulum? a. steroid-based hormone synthesis b. protein synthesis in conjunction with ribosomes c. cholesterol synthesis d. lipid metabolism e. breakdown of stored glycogen to form free glucose

Which vesicular transport process occurs primarily in some white blood cells and macrophages?

Which of the following is a principle of the fluid mosaic model of cell membrane structure? a. The lipid bilayer is a solid at body temperature, thus protecting the cell. b. Phospholipids consist of a polar head and a nonpolar tail made of three fatty acid chains. c. Phospholipids form a bilayer that is largely impermeable to water-soluble molecules. d. All proteins associated with the cell membrane are contained in a fluid layer on the outside of the cell.

Which statement is the most correct regarding transcription/translation? a. The nucleotide sequence in a tRNA anticodon is an exact copy of the DNA triplet that coded for it. b. The nucleotide sequence in a mRNA codon is an exact copy of the DNA triplet that coded for it except that uracil is substituted for thymine. c. The nucleotide sequence in a tRNA anticodon is an exact copy of the DNA triplet that coded for it except that uracil is substituted for thymine. d. The nucleotide sequence in a mRNA codon is an exact copy of the DNA triplet that coded for it.

Mitosis is ______

Which of the following is a function of a plasma membrane protein? a. molecular transport through the membrane b. circulating antibody c. location where protein synthesis occurs d. forms a lipid bilayer e. oxygen transport

Which of the following would not be a constituent of a plasma membrane? a. phospholipids b. peripheral proteins c. phosphobicarbonates d. glycolipids e. glycoproteins

If cells are placed in a hypertonic solution containing a solute to which the membrane is impermeable, what could happen?