Question 1

Refer to the energy diagram provided. Which of the following correctly identifies the labels A, B, and C?

Accepted Answer

A - Transition state, B - Activation energy in the absence of an enzyme, C - Activation energy in the presence of an enzyme.

Question 2

Which process in the mitochondrion is primarily responsible for the conversion of ADP to ATP?

Accepted Answer

Oxidative phosphorylation

Question 3

The majority of spontaneous reactions ________ the entropy of the system.

Accepted Answer

increase

Question 4

In noncompetitive inhibition, how does the inhibitor prevent the substrate from binding to the enzyme's active site?

Accepted Answer

By changing the conformation of the active site.

Question 5

The active site is the specific region in a/an ________ where a/an ________ binds.

Accepted Answer

enzyme, substrate

Question 6

During lactic acid fermentation, the lactate is synthesized from pyruvate via the use of _______ as a reducing agent.

Accepted Answer

NADH

Question 7

Select the answer that describes the correct order of the stages in cellular respiration:

Accepted Answer

Glycolysis, Krebs Cycle, ETC & Oxidative Phosphorylation.

Question 8

Which of the following statements are true regarding oxidative and substrate-level phosphorylation?

Accepted Answer

O. ATP is formed during glycolysis through substrate-level phosphorylation and P. The exact mechanism of ATP formation in oxidative phosphorylation is chemiosmosis.

Question 9

Which reactions of the Krebs cycle involve oxidative decarboxylation?

Accepted Answer

N. citrate to alpha-ketoglutarate and O. alpha-ketoglutarate to succinyl CoA

Question 10

What evidence supports the hypothesis that certain bacteria produce magnetite and perform cellular respiration?

Accepted Answer

Bacteria treated with drugs that inhibit enzymes of the electron transport chain failed to produce magnetite.

Question 11

How can we distinguish an oxidizing agent in a redox reaction?

Accepted Answer

It gains electrons

Question 12

Chemiosmosis is a pathway of ATP production that utilizes a proton gradient. Through which structure do H$$^+$$ ions move down their concentration gradient?

Accepted Answer

ATP synthase

Question 13

Which of the following options correctly includes all the products of glycolysis?

Accepted Answer

Pyruvate, ATP and NADH

Question 14

Which of the following processes provides energy in the form of ATP to nearly all living organisms?

Accepted Answer

Glycolysis

Question 15

The biological membrane is made up of a bilayer with _________ and ________ molecules embedded in it.

Accepted Answer

Phospholipid and protein

Question 16

In animals, the protein ____ gives the tissues strength and structural integrity. This function is performed by the _______ in plant cells.

Accepted Answer

Collagen; cell wall

Question 17

The engulfment of a dead cell is an example of which type of endocytosis?

Accepted Answer

Phagocytosis

Question 18

Simple diffusion, in contrast to facilitated diffusion _______

Accepted Answer

Moves small, non-polar molecules

Question 19

Which of the following is a characteristic of passive transport but not active transport?

Accepted Answer

Kinetic energy dependence

Question 20

The cell membrane must be ____________ for osmosis to take place.

Accepted Answer

Semipermeable

Step-by-Step Guidance for General Biology Exam III (Ch 7,8,9)

Guida di studio - Domande di pratica

Study guide - Flashcard