普通生物學一上108期中考古題

39問 • 2年前

楊雅筑

通報

問題一覧

The force driving simple diffusion is _______, while the energy source for active transport is _______.

the concentration gradient; ATP

A bacterium engulfed by a white blood cell through phagocytosis will be digested by enzymes contained in ________.

lysosomes

The voltage across a membrane is called the ________.

membrane potential

What kinds of molecules pass through a cell membrane most easily?

（B）small and hydrophobic

Which of these are NOT embedded in the hydrophobic portion of the lipid bilayer at all?

peripheral proteins

Protein phosphorylation is commonly involved with all of the following EXCEPT ________.

activation of G protein-coupled receptors

If a pharmaceutical company wished to design a drug to maintain low blood sugar levels, one approach might be to design a compound ________.

to block G protein activity in liver cells

Put the step of the process of signal transduction in the order they occur: 1. A conformational change in the signal-receptor complex activates an enzyme. 2. Protein kinases are activated. 3. A signal molecule binds to a receptor. 4. Target proteins are phosphorylated. 5. Second messenger molecules are released.

31524

Scaffolding proteins are ________.

large molecules to which several relay proteins attach to facilitate cascade effects

In yeast signal transduction, a yeast cell releases a mating factor which ________.

binds to receptors on the membranes of other types of yeast cells

Which of the following best summarizes the relationships between dehydration reactions and hydrolysis?

Dehydration reactions assemble polymers; hydrolysis reactions break polymers apart

Phospholipids and triglycerides both ________.

（C）have a glycerol backbone

You disrupt all hydrogen bonds in a protein. What level of structure will be preserved?

primary structure

If a DNA sample were composed of 10% thymine, what would be the percentage of guanine?

If one strand of a DNA molecule has the sequence of bases 5’ATTGCA3’, the other complementary strand would have the sequence ________.

5’TGCAAT3’

In a bacterium, we will find DNA in ________.

the nucleoid

Which structure is common to plant and animal cells?

（C）mitochondrion

Which organelle often takes up much of the volume of a plant cell?

vacuole

Large numbers of ribosomes are present in cells that specialize in producing which of the following molecules?

proteins

In a plant cell, DNA may be found ________.

in the nucleus, mitochondria, and chloroplasts

Which statement about energy is not true?

In the universe as a whole, the amount of entropy decrease

In a chemical reaction,

the rate depends on the activation energy

A sigmoid curve in the graph of reaction rate - substrate concentration is typical for

an enzyme with multiple subunits, each with an active site

Nerve gases such as Sarin and malathion

（D）bond covalently to the active site of the enzyme

In a chemical reaction,

（B）transition state have higher free energy than either the reactants or the products

The final products of glycolysis are; (1)ATP (2)CO2 (3)pyruvate (4)NAD+ (5)NADH

135

In eukaryotic cells, the citric acid cycle

（D）is positively regulated by ADP or NAD+

Substrate-level phosphorylation

（D）uses kinase as the enzyme

Which statement is true?

（A）the more oxidized a carbon atom in a molecule is, the less its free energy

What is proton-motive force?

the force provided by a transmembrane hydrogen ion gradient

G1 is associated with which of the following cellular event?

normal growth and cell function

What is the name of the microtubule-organizing center found in animal cells as an identifiable structure present during all phases of the cell cycle?

centrosome

The mitotic spindle plays a critical role in which of the following processes?

separation of sister chromatids

Metaphase is characterized by ________.

alignment of chromosomes on the equator of the cell

At which phase of the cell cycle do centrioles begin to move apart in animal cells?

prophase

A cleavage furrow is ________.

a groove in the plasma membrane between daughter nuclei

Which of the following properties is associated with a cyclin-dependent kinase (Cdk)?

（D）A Cdk is an enzyme that attaches phosphate groups to other proteins

Why do neurons and some other specialized cells divide infrequently?

They have entered into G0

Which of the following statements describes the chromosomal makeup of each daughter cell after telophase of meiosis I?

The cells are haploid, and the chromosomes are each composed of two chromatids

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大體解剖學一上108期中考古題

楊雅筑 · 4回閲覧 · 28問 · 2年前

大體解剖學一上108期中考古題

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普通生物學一上107期中考古題

普通生物學一上107期中考古題

普通生物學一上109期中考古題

普通生物學一上109期中考古題

普通生物學一上111期中考古題

普通生物學一上111期中考古題

大體解剖學一上111期中考古題

大體解剖學一上111期中考古題

問題一覧

The force driving simple diffusion is _______, while the energy source for active transport is _______.

the concentration gradient; ATP

A bacterium engulfed by a white blood cell through phagocytosis will be digested by enzymes contained in ________.

lysosomes

The voltage across a membrane is called the ________.

membrane potential

What kinds of molecules pass through a cell membrane most easily?

（B）small and hydrophobic

Which of these are NOT embedded in the hydrophobic portion of the lipid bilayer at all?

peripheral proteins

Protein phosphorylation is commonly involved with all of the following EXCEPT ________.

activation of G protein-coupled receptors

If a pharmaceutical company wished to design a drug to maintain low blood sugar levels, one approach might be to design a compound ________.

to block G protein activity in liver cells

31524

Scaffolding proteins are ________.

large molecules to which several relay proteins attach to facilitate cascade effects

In yeast signal transduction, a yeast cell releases a mating factor which ________.

binds to receptors on the membranes of other types of yeast cells

Which of the following best summarizes the relationships between dehydration reactions and hydrolysis?

Dehydration reactions assemble polymers; hydrolysis reactions break polymers apart

Phospholipids and triglycerides both ________.

（C）have a glycerol backbone

You disrupt all hydrogen bonds in a protein. What level of structure will be preserved?

primary structure

If a DNA sample were composed of 10% thymine, what would be the percentage of guanine?

If one strand of a DNA molecule has the sequence of bases 5’ATTGCA3’, the other complementary strand would have the sequence ________.

5’TGCAAT3’

In a bacterium, we will find DNA in ________.

the nucleoid

Which structure is common to plant and animal cells?

（C）mitochondrion

Which organelle often takes up much of the volume of a plant cell?

vacuole

Large numbers of ribosomes are present in cells that specialize in producing which of the following molecules?

proteins

In a plant cell, DNA may be found ________.

in the nucleus, mitochondria, and chloroplasts

Which statement about energy is not true?

In the universe as a whole, the amount of entropy decrease

In a chemical reaction,

the rate depends on the activation energy

A sigmoid curve in the graph of reaction rate - substrate concentration is typical for

an enzyme with multiple subunits, each with an active site

Nerve gases such as Sarin and malathion

（D）bond covalently to the active site of the enzyme

In a chemical reaction,

（B）transition state have higher free energy than either the reactants or the products

The final products of glycolysis are; (1)ATP (2)CO2 (3)pyruvate (4)NAD+ (5)NADH

135

In eukaryotic cells, the citric acid cycle

（D）is positively regulated by ADP or NAD+

Substrate-level phosphorylation

（D）uses kinase as the enzyme

Which statement is true?

（A）the more oxidized a carbon atom in a molecule is, the less its free energy

What is proton-motive force?

the force provided by a transmembrane hydrogen ion gradient

G1 is associated with which of the following cellular event?

normal growth and cell function

What is the name of the microtubule-organizing center found in animal cells as an identifiable structure present during all phases of the cell cycle?

centrosome

The mitotic spindle plays a critical role in which of the following processes?

separation of sister chromatids

Metaphase is characterized by ________.

alignment of chromosomes on the equator of the cell

At which phase of the cell cycle do centrioles begin to move apart in animal cells?

prophase

A cleavage furrow is ________.

a groove in the plasma membrane between daughter nuclei

Which of the following properties is associated with a cyclin-dependent kinase (Cdk)?

（D）A Cdk is an enzyme that attaches phosphate groups to other proteins

Why do neurons and some other specialized cells divide infrequently?

They have entered into G0

Which of the following statements describes the chromosomal makeup of each daughter cell after telophase of meiosis I?

The cells are haploid, and the chromosomes are each composed of two chromatids