Midterm Questions 2: Question Preview (ID: 26623)

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The structure that regulates what enters and leaves the cell is the
a) nucleus b) cell wall c) nuclear membrane d) cell membrane
Short hairlike structures that protrude from the surface of a cell and are packed in tight rows are called
a) flagella b) microtubules c) microfilaments d) cilia
A molecule shaped like a spiral staircase (double helix) is a typical of
a) deoxyribonucleic acid b) ribonucleic acid c) lipids d) carbohydrates
A structure within a eukaryotic cell that performs a specific function is called an
a) Organelle b) organ tissue c) tissue d) biocenter
an enzyme
a) is not used up when catalyzing a reaction b) lowers the activation energy of a reaction c) bonds with a substrate molecule at the enzyme's active site d) all of the above
a) are able to heat up molecules so that they can react b) always provide carbon dioxide for chemical reactions c) are biological catalysts d) absorb excess heat so that reactions occur at low temperatures
Which of the following is an example of a prokaryotic cell?
a) amoeba b) virus c) bacterium d) liver cell
Only eukaryotic cells have
a) DNA b) membrane-bound organelles c) ribosomes d) cytoplasm
Ridding the cell of materials by discharging the materials in vesicles is called
a) osmosis b) diffusion c) exocytosis d) endocytosis
One difference between prokaryotes and eukaryotes is that
a) nucleic acids are found only in prokaryotes b) mitochondria are fond in larger quantities in eukaryotes c) Golgi vesicles are found in larger quantities in eukaryotes d) prokaryotes do not have a nucleus
Molecules that are too large to be moved across a cell can be removed from the cell by
a) diffusion b) exocytosis c) endocytosis d) osmosis
Which of the following is an example of active transport
a) osmosis b) diffusion c) facilitated diffusion d) sodium potassium pump
The first three phases of the cell cycle are collectively known as the
a) cellular respiration b) telophase c) mitosis d) interphase
The phase of mitosis that is characterized by the arrangement of all chromosomes alone the equator of the cell is called
a) telophase b) metaphase c) anaphase d) prophase
The electrons of an atom
a) are found in the nucleus along with the protons b) occupy space surrounding the nucleus c) have a positive energy d) are attached to the positive charge of the neutrons
Unlike passive transport, active transport
a) requires energy b) moves substances down their concentration gradient. c) osmosis d) gated channels
Osmosis is a type of
a) active transport b) passive transport c) facilitated diffusion d) endocytosis
The dispersal of ink from a beaker of water is an example of
a) diffusion b) osmosis c) active transport d) endocytosis
The diffusion of water into or out of a cell is called
a) solubility b) osmosis c) active transport d) endocytosis
Diffusion is the movement of a substance
a) only through a lipid bilayer membrane b) from an area of high concentration to an area of low concentration c) from an area of low concentration to an area of high concentration d) only in liquids
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