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TEST 2 ANATOMY-2
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Questions in this quiz (25)
1The three components of the cytoplasm of a cell are
- Acytosol
- Binclusions
- Corganelles
- Dmitocondria
2If the nucleotide or base sequence of the DNA strand used as a template for messenger RNA
synthesis is ACGTT, then the sequence of bases in the corresponding mRNA would be- ATGCAA
- BACGTT
- CUGCAA
- DGUACC
3Which of the following is true regarding cells in humans?
- AOrganelles are independent life forms.
- BMaximum cell diameter is limited to 2 micrometers.
- CCells can be as long as 1 meter.
- DAll cells of an adult have a very short life span.
4Phospholipids ________.
- Aare exclusively hydrophilic molecules
- Bcontain polar tails and nonpolar head groups
- Care both hydrophilic and hydrophobic in nature
- Dform the lipid bilayer, with tails directed to the outside
5Passive membrane transport processes include ________.
- Amovement of a substance down its concentration gradient
- Bmovement of water from an area of low concentration to an area of high concentration
- Cconsumption of ATP
- Dthe use of transport proteins when moving substances from areas of low to high
concentration
6Enzymes called _________ destroy the cellʹs DNA and cytoskeleton, producing a quick death
to the cell.- Aubiquitins
- Bcyclins
- Ccaspases
- DDNA polymerase III
7Mitochondria ________.
- Aare always the same shape
- Bare single-membrane structures involved in the breakdown of ATP
- Ccontain some of the DNA and RNA code necessary for their own function
- Dsynthesize proteins for use outside the cell
8Ribosomes, endoplasmic reticulum, and the Golgi apparatus functionally act in sequence to
synthesize and modify proteins for secretory use (export) only, never for use by the cell. This
statement is ________.- Afalse; proteins thus manufactured are for use inside the cell only
- Bfalse; integral cell membrane proteins are also synthesized this way
- Cfalse; lipids, not proteins, are synthesized this way
- Dtrue
9Peroxisomes ________.
- Aalso called microbodies, contain acid hydrolases
- Bare able to detoxify substances by enzymatic action
- Cfunction to digest particles ingested by endocytosis
- Dsometimes function as secretory vesicles
10DNA replication ________.
- Acan also be called mitosis
- Bis spontaneous, not requiring enzyme action
- Ctakes place during interphase of the cell cycle
- Doccurs only in translationally active areas
11Which statement is the most correct regarding transcription/translation?
- AThe nucleotide sequence in a mRNA codon is an exact copy of the DNA triplet that
coded for it. - BThe 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. - CThe nucleotide sequence in a tRNA anticodon is an exact copy of the DNA triplet that
coded for it. - DThe 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.
- AThe nucleotide sequence in a mRNA codon is an exact copy of the DNA triplet that
12In the maintenance of the cell resting membrane potential ________.
- Aextracellular sodium levels are high
- Bcells are more permeable to Na+ than K+
- Cthe steady state involves only passive processes in all cells
- Dthe inside of the cell is positive relative to its outside
13Which of the following is a concept of the cell theory?
- ASimple cells can arise spontaneously from rotting vegetation.
- BA cell is the basic structural and functional unit of living organisms.
- CThe subcellular organelle is the basic unit of life
14Cells are composed mainly of ________.
- Acarbon, hydrogen, nitrogen, oxygen
- Bcalcium, oxygen, sodium, potassium
- Ccarbon, sodium, nitrogen, calcium
15Which of the following is a principle of the fluid mosaic model of cell membrane structure?
- APhospholipids form a bilayer that is largely impermeable to water-soluble molecules.
- BPhospholipids consist of a polar head and a nonpolar tail made of three fatty acid chains.
- CThe lipid bilayer is a solid at body temperature, thus protecting the cell.
16Which of the following statements is most correct regarding the intracellular chemical signals
known as ʺsecond messengersʺ?- ASecond messengers act through receptors called K-proteins.
- BSecond messengers usually inactivate protein kinase enzymes.
- CCyclic AMP and calcium may be second messengers.
17The main component of the cytosol is ________.
- Aproteins
- Bsugars
- Csalts
- Dwater
18 Lysosomes ________.
- Aare always used for the cell to ʺcommit suicideʺ
- Bcontain acid hydrolases that are potentially dangerous to the cell
- Cmaintain a highly alkaline internal environment
- Dare the major site of protein synthesis
19The endomembrane system is ________.
- Aa system by which cells are riveted together by desmosomes
- Ban interactive system of organelles whose membranes are physically or functionally
connected - Cthe process by which bacteria took up residence in ancient cells
20The functions of centrioles include ________.
- Aorganizing the mitotic spindle in cell division
- Bproviding a whiplike beating motion to move substances along cell surfaces
- Cserving as the site for ribosomal RNA synthesis
21A gene can best be defined as ________.
- Aa three-base triplet that specifies a particular amino acid
- Bnoncoding segments of DNA up to 100,000 nucleotides long
- Ca segment of DNA that carries the instructions for one polypeptide chain
22Extracellular matrix is ________.
- Acomposed of strands of actin protein
- Bthe most abundant extracellular material
- Ca type of impermeable cell junction found in epithelia
23Crenation is likely to occur in ________.
- Ablood cells in an isotonic solution
- Bblood cells in a hypotonic solution
- Cblood cells in a hypertonic solution
24Some hormones enter cells via ________.
- Aexocytosis
- Bendocytosis
- Cpinocytosis
- Dreceptor-mediated endocytosis
25If a tRNA had an AGC anticodon, it could attach to a(n) ________ mRNA codon.
- AAUG
- BUCG
- CTCG
- DUGA
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- ANATOMY EXAM 2 Quiz on TEST 2 ANATOMY-2, created by Yan Taco on 24/10/2016.
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- Yan Taco
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- English
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