EXAMS CARDS Flashcards by Collins Bawa

Glucose generated from none carbs is called

Gluconeogenesis

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Which of the glucose transporters is under the control of insulin

Glucose transporter 4

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Glycolysis takes place in the?

Cytoplasm

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Lactase is present in the brush border of the small intestine — it is called

Brush border enzyme

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All the transporters do not use insulin accept?

Glucose transporter 4

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DNA replication takes place in the?

S phase

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An ionic bond is formed between atoms of the same element.

a) Atoms of the same element
b) Atoms of different elements ✔
c) Molecules of similar types
d) None of the above

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The number of lone pairs of electrons present in ammonia is?

a) 1 pair✔
b) 2 pairs
c) 3 pairs
d) None

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How many lone pairs are present in water (H₂O)?

a) 1 pair
b) 2 pairs✔
c) 3 pairs
d) None

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In a molecule, atoms are held together with the help of?

a) Ionic bond
b) Chemical bond✔
c) Physical force
d) None of the above

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Nitrogen molecule is an example of what?

a) A single covalent bond
b) A double covalent bond
c) A triple covalent bond✔
d) Single coordinate bond

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To form an ion, a non-metal atom…

a) Loses electrons
b) Gains electrons✔
c) Loses protons
d) Gains protons

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Bond formed by sharing 4 electrons is known as?

a) Single covalent bond
b) Double covalent bond✔
c) Triple covalent bond
d) Coordinate bond

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What is the level pH found in an antesic solution?

a) Less than or equal to 6.5
b) Greater than or equal to 7.0 ✔
c) Greater than 10
d) Greater than 14

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Which of the following properties of water does not contribute to the fitness of life?

a)
b) High specific heat
c) The density of water is greater than the density of ice
d) The very low molecule of water✔

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What is the molecular formula for monosaccharides?

a) C₆H₁₂O₆✔
b) C₁₂H₂₂O₁₁
c) C₆H₁₀O₅
d) None of the above

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Which of the following organs has an obligatory requirement for glucose as the fuel?

a) Heart
b) Adipose tissue
c) Kidney
d) Brain✔

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The sugar found in RNA is known as?

Ribose✔

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The sugar found in DNA is known as?

Deoxyribose✔

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A polysaccharide which is often called animal starch is?

a) Glycogen✔
b) Starch
c) Inulin
d) Dextrin

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The homopolysaccharide used for intravenous infusion as a plasma substitute is called?

a) Agar✔
b) Inulin
c) Pectin
d) Starch

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Which of the following is a heteroglycan?

a) Dextrin
b) Agar✔
c) Inulin
d) Chitin

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The approximate number of branches in amylopectin?

a) Every 10-15 glucose units
b) Every 24-30 glucose units✔
c) Every 50-60 glucose units
d) None of the above

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The physicists’ lock and key model of enzyme action implies that:

a) The active site is flexible and adjusts to the substrate
b) Substrate changes conformation prior to active site interaction
c) Active site is complementary in shape to that of the substrate✔
d) Active site becomes complementary only after interaction with the substrate

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In one DNA molecule, the guanine content is 40%. What will be the adenine content?

a) 10%✔ b) 20% c) 30% d) 40%

The double helical structure of DNA molecule model was proposed by?

a) Watson and Crick✔ b) Franklin and Wilkins c) Chargaff d) None of the above

RNA does not contain?

a) Thymine✔ b) Uracil c) Adenine d) Guanine

Glucose has how many isomers?

a) 8 b) 16✔ c) 32 d) 64

Which of the following statements about double-stranded DNA is false?

a) The backbone contains alternative ribose sugar and phospho groups✔ b) The 2 strands have an anti-parallel orientation c) The bases are on the inside of the double helix d) The helix has 2 grooves called the major groove and the minor groove

Enzyme & product: Step 1 of glycolysis (Glc → Glc-6-P)?

Hexokinase

Enzyme & product: Step 3 of glycolysis (Fru-6-P → Fru-1,6-bisP)?

Phosphofructokinase-1

Enzyme & product: Step 2 of glycolysis (Glucose-6-P → Fructose-6-P)?

Phosphoglucose isomerase

Enzyme & product: Step 4 of glycolysis (Fru-1,6-bisP → G3P + DHAP)?

Aldolase

Enzyme & product: Step 5 of glycolysis (DHAP ↔ G3P)?

Triose phosphate isomerase

Enzyme & product: Step 6 of glycolysis (G3P → 1,3-Bisphosphoglycerate)?

Glyceraldehyde-3-phosphate dehydrogenase

Enzyme & product: Step 7 of glycolysis (1,3-BPG → 3-Phosphoglycerate)?

Phosphoglycerate kinase

Enzyme & product: Step 8 of glycolysis (3-PG → 2-Phosphoglycerate)?

Phosphoglycerate mutase

Enzyme & product: Step 9 of glycolysis (2-PG → PEP)?

Enolase

Enzyme & product: Step 10 of glycolysis (PEP → Pyruvate)?

Pyruvate kinase

Galactose is found in what?

- Lactose (milk sugar)✔ - Glycoproteins & glycolipids✔ - Plant polysaccharides✔ In everyday terms, your main dietary source of galactose is dairy products, where it’s released during digestion of lactose.

When pyruvate is formed, it can be converted to?

- Alanine.✔ - Oxaloacetate.✔ - Lactate.✔ - Acctyl CoA.✔

When pyruvate is formed, it can be converted to oxaloacetate or acetyl CoA by an enzymes called?

Pyruvate carboxylase.✔ Pyruvate dehydrogenase complex.✔

To form anion, non-metal atom; A. loses electrons B. gain electrons C. loses protons D. gains protons

B. gain electrons✔

Pairs of outer shell electrons not used in bonding are called as; A. Valence electrons B. donor electrons C. Electrovalent electrons D. lone pairs

D. lone pairs✔

Charge on any ion depends upon gain or loss of; A. Electrons B. protons C. neutrons D. nucleons

A. Electrons✔

Bond formed by sharing of four electrons is called as; A. Covalent bond B. electrovalent bond C. dative covalent bond D. double covalent bond

D. double covalent bond✔

Complete transfer of one or more electrons between atoms constituting in form; A. Ionic bond B. Covalent bond C. Co-ordinate bond D. Dative bond

A. Ionic bond✔

When single atom provides both electrons which are needed for completion of covalent bond then it leads to; A. Ionic bond B. Covalent bond C. Co-ordinate bond D. Metallic bond

C. Co-ordinate bond✔

Three unknown solutions are given with pH value of 6, 8 & 9.5 respectively. Which solution will contain the maximum OH– ion? A. Solution sample-1 B. Solution sample-2 C. Solution sample-3 D. Data are insufficient

C. Solution sample-3✔

The pH of a sample of blood is 7.4, while gastric juice is pH 1.4. The blood sample has: A. 0.189 times the [H+] as the gastric juice. B. 5.29 times lower [H+] than the gastric juice. C. 6 times lower [H+] than the gastric juice. D. a million times lower [H+] than the gastric juice

D. a million times lower [H+] than the gastric juice✔

Which of the following properties of water does not contribute to the fitness of the aqueous environment for living organisms? A. Cohesion of liquid water due to hydrogen bonding. B. High specific heat. C. The density of water is greater than the density of ice. D. The very low molecular weight of water

D. The very low molecular weight of water✔

What is the pOH of a 0.0235 M HCl solution? A. 12.37 B. 1.63 C. 14.00 D. 23. 50

A. 12.37✔

What is the pH of a 0.0235 M HCl solution? A. 12.37 B. 1.63 C. 11.81 D. 2. 19

B. 1.63✔

What is the pH of a 6.50 x 10-3 M KOH solution? A. 12.37 B. 1.63 C. 11.81 D. 2. 19

C. 11.81✔

What is the pH of a 6.2 x 10-5 M NaOH solution? A. 4.21 B. 9.79 C. 6.25 D. 10.05

B. 9.79✔

Which of the following organ has an obligatory requirement for glucose as the fuel? A. Brain B. Kidney C. Adipose tissue D. Heart

A. Brain✔

The sugar found in DNA is; A. Xylose B. Ribose C. Deoxyribose D. Ribulose

C. Deoxyribose ✔

The sugar found in RNA is; A. Ribose B. Deoxyribose C. Ribulose D. Erythrose

A. Ribose ✔

The sugar found in milk is; A. Galactose B. Glucose C. Fructose D. Lactose

D. Lactose✔

The monosaccharide units are linked by 1 → 4 glycosidic linkage in; A. Maltose B. Sucrose C. Cellulose D. Cellobiose

A. Maltose✔

Mutarotation refers to change in; A. pH B. Optical rotation C. Conductance D. Chemical properties

B. Optical rotation✔

A polysaccharide which is often called animal starch is; A. Glycogen B. Starch C. Inulin D. Dextrin

A. Glycogen✔

The homopolysaccharide used for intravenous infusion as plasma substitute is; A. Agar B. Inulin C. Pectin D. Starch

A. Agar✔

Which of the following is a heteroglycan? A. Dextrins B. Agar C. Inulin D. Chitin

B. Agar✔

The approximate number of branches in amylopectin is; A. 10 B. 20 C. 40 D. 80

C. 40✔

Fischer’s ‘lock and key’ model of the enzyme action implies that; A. The active site is complementary in shape to that of substance only after interaction. B. The active site is complementary in shape to that of substance C. Substrates change conformation prior to active site interaction D. The active site is flexible and adjusts to substrate

B. The active site is complementary in shape to that of substance✔

All the enzymes of glycolysis pathway are found in; A. Extramitochondrial soluble fraction of the cell B. Mitochondria C. Nucleus D. Endoplasmic reticulum

A. Extramitochondrial soluble fraction of the cell✔

In a DNA molecule, the guanosine content is 40%, the adenine content will be; A. 10% B. 20% C. 30% D. 40%

A. 10%✔

The net number of ATP formed per mole of glucose in anaerobic glycolysis is; A. 1 B. 2 C. 6 D. 8

B. 2✔

The fact that DNA bears the genetic information of an organism implies that; A. Base composition should be identical from species to species B. DNA base composition should charge with age C. DNA from different tissues in same organism should usually have the same base composition D. DNA base composition is altered with nutritional state of an organism

C. DNA from different tissues in same organism should usually have the same base composition✔

A Holoenzyme is; A. Functional unit B. Apo enzyme C. Coenzyme D. All of these

A. Functional unit✔

Side chains of all following amino acids contain aromatic rings except; A. Phenyl alanine B. Alanine C. Tyrosine D. Tryptophan

B. Alanine✔

Protein present in hemoglobin has the structure known as; A. Primary B. Secondary C. Tertiary D. Quarternary

D. Quarternary✔

All α-amino acids have one asymmetric carbon atom except; A. Arginine B. Glycine C. Aspartic acid D. Histidine

B. Glycine✔

In enzyme kinetics Vmax reflects; A. The amount of an active enzyme B. Substrate concentration C. Half the substrate concentration D. Enzyme substrate complex

A. The amount of an active enzyme✔

In enzyme kinetics Km implies; A. The substrate concentration that gives one half Vmax B. The dissociation constant for the enzyme substrate complex C. Concentration of enzyme D. Half of the substrate concentration required to achieve Vmax

A. The substrate concentration that gives one half Vmax✔

Coenzymes are; A. Heat stable, dialyzable, non-protein organic molecules B. Soluble, colloidal, protein molecules C. Structural analogue of enzymes D. Different forms of enzymes

A. Heat stable, dialyzable, non-protein organic molecules✔

EXAMS CARDS Flashcards

(77 cards)