A&P 1 Straighterline Final Practice Exam
| Latest 2024 | Questions and Answers
What type of membrane proteins can catalyze chemical reactions
on the inner or outer surfaces of the plasma membrane?
Select one:
a. marker molecules
b. channel protein
c. receptor proteins
d. enzymes
e. carrier proteins - Correct Answer -enzymes
The "control center" of the cell is the
Select one:
a. nucleus.
b. ribosome.
c. mitochondrion.
d. plasma membrane.
e. endoplasmic reticulum. - Correct Answer -nucleus
Internal structures of a cell that carry out specialized metabolic
tasks are called _____.
Select one:
,a. organelles
b. ribosomes
c. enzymes
d. cytoskeletal elements - Correct Answer -organelles
The plasma membrane is selectively permeable. This means
Select one:
a. only gases and water can pass through it.
b. substances need permission to pass through it.
c. only certain substances can pass through it.
d. substances need carrier molecules to pass through it.
e. ATP is always needed to move molecules across the plasma
membrane. - Correct Answer -only certain substances can pass
through it.
Plasma membrane phospholipids
Select one:
a. have polar (charged) tails.
b. are arranged in a single layer.
c. have tails that face the exterior of the membrane.
d. are 95% cholesterol.
e. have a hydrophilic head and hydrophobic tails. - Correct
Answer -have a hydrophilic head and hydrophobic tails.
,A symporter will transport _____ across the cell membrane.
Select one:
a. two different ions or molecules in opposite directions
b. two different ions or molecules in the same direction
c. two of the same ions or molecules in the same direction
d. one specific ion or molecule
e. two of the same ions or molecules in opposite directions -
Correct Answer -two different ions or molecules in the same
direction
The structural RNA of ribosomes is a
Select one:
a. pre-mRNA.
b. proenzyme.
c. gene.
d. ribosomal RNA (rRNA).
e. codon. - Correct Answer -ribosomal RNA (rRNA).
Three adjacent nucleotides in mRNA are called a
Select one:
a. pre-mRNA.
b. proenzyme.
c. gene.
d. ribosomal RNA (rRNA).
, e. codon. - Correct Answer -codon
Which of the following is NOT true of a gene?
Select one:
a. It is all the triplets needed to make a functional RNA or protein.
b. It is a segment of a DNA molecule.
c. Each chromosome contains one gene.
d. It is the functional unit of heredity.
e. All of these are true of a gene. - Correct Answer -Each
chromosome contains one gene
If the amino acid coding region of a mRNA molecule is 1800
nucleotides (bases) in length, this molecule will contain _____
codons.
Select one:
a. 400
b. 600
c. 800
d. 900
e. 1200 - Correct Answer -600
DNA replication occurs during
Select one:
a. the G1 phase of interphase.
| Latest 2024 | Questions and Answers
What type of membrane proteins can catalyze chemical reactions
on the inner or outer surfaces of the plasma membrane?
Select one:
a. marker molecules
b. channel protein
c. receptor proteins
d. enzymes
e. carrier proteins - Correct Answer -enzymes
The "control center" of the cell is the
Select one:
a. nucleus.
b. ribosome.
c. mitochondrion.
d. plasma membrane.
e. endoplasmic reticulum. - Correct Answer -nucleus
Internal structures of a cell that carry out specialized metabolic
tasks are called _____.
Select one:
,a. organelles
b. ribosomes
c. enzymes
d. cytoskeletal elements - Correct Answer -organelles
The plasma membrane is selectively permeable. This means
Select one:
a. only gases and water can pass through it.
b. substances need permission to pass through it.
c. only certain substances can pass through it.
d. substances need carrier molecules to pass through it.
e. ATP is always needed to move molecules across the plasma
membrane. - Correct Answer -only certain substances can pass
through it.
Plasma membrane phospholipids
Select one:
a. have polar (charged) tails.
b. are arranged in a single layer.
c. have tails that face the exterior of the membrane.
d. are 95% cholesterol.
e. have a hydrophilic head and hydrophobic tails. - Correct
Answer -have a hydrophilic head and hydrophobic tails.
,A symporter will transport _____ across the cell membrane.
Select one:
a. two different ions or molecules in opposite directions
b. two different ions or molecules in the same direction
c. two of the same ions or molecules in the same direction
d. one specific ion or molecule
e. two of the same ions or molecules in opposite directions -
Correct Answer -two different ions or molecules in the same
direction
The structural RNA of ribosomes is a
Select one:
a. pre-mRNA.
b. proenzyme.
c. gene.
d. ribosomal RNA (rRNA).
e. codon. - Correct Answer -ribosomal RNA (rRNA).
Three adjacent nucleotides in mRNA are called a
Select one:
a. pre-mRNA.
b. proenzyme.
c. gene.
d. ribosomal RNA (rRNA).
, e. codon. - Correct Answer -codon
Which of the following is NOT true of a gene?
Select one:
a. It is all the triplets needed to make a functional RNA or protein.
b. It is a segment of a DNA molecule.
c. Each chromosome contains one gene.
d. It is the functional unit of heredity.
e. All of these are true of a gene. - Correct Answer -Each
chromosome contains one gene
If the amino acid coding region of a mRNA molecule is 1800
nucleotides (bases) in length, this molecule will contain _____
codons.
Select one:
a. 400
b. 600
c. 800
d. 900
e. 1200 - Correct Answer -600
DNA replication occurs during
Select one:
a. the G1 phase of interphase.
