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DAT > Questions wrongs - biology > Flashcards

Questions wrongs - biology Flashcards

Bio bits

1
Q

Which of the following describes when a cofactor is covalently bound to an enzyme

A

prosthetic group

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2
Q

Which of the following best describes anabolism?

A

the synthesis of molecules that requires energy

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3
Q

All of the chemical processes in the human body that sustain life is known as _______________.

A

Metabolism

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4
Q

Which of the following describes metabolism?

A

A group of anabolic and catabolic reactions that produce energy

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5
Q

In the body, which of the following experiences cooperativity?

A

Hemoglobin

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6
Q

Which of the following best describes the ability of enzymes to catalyze reactions?

A

Decrease activation energy

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7
Q

If a Km value of an enzyme is elevated, then the __________.

A

Substrate does not bind to the enzyme well

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8
Q

In order to counteract competitive inhibition, which of the following can be done?

A

increase substrate concentration

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9
Q

A substance binds to an allosteric site of an enzyme, preventing the needed chemical reaction from going through completion. Which of the following is occurring to the enzyme?

A

non-competitive inhibition

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10
Q

Which of the following is an enzyme used by the human body?

A

pepsin

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11
Q

If the Km value of an enzyme is small, which of the following best represents what is occurring?

A

enzyme requires a small amount of substrate

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12
Q

How do u know which cleavage a cell will undergo

A

It depends on the amount of yolk found within the cell

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13
Q

what process does sea urchins undergo during cleavage

A

Holoblastic Cleavage

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14
Q

In a resting adult, approximately how much blood are in the vessels of the human dermis?

A

10%

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15
Q

The epidermis relies on which of the following for oxygen and nutrients?

A

Dermis

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16
Q

Which of the following epidermal layers is only present on the fingertips and feet?

A

Stratum Lucidum

17
Q

The stratum granulosum releases hydrophobic lipids via _______.

A

Lamellar Bodies

18
Q

Which of the following contributes to the flexibility of the epidermis?

A

stratum Spinosum

19
Q

The stratum spinous is held together with _______.

A

Desmosomes

20
Q

As keratinocytes rise to the uppermost layer, they _______.

A

Lose organelles

21
Q

Which of the following is the most abundant protein in the epidermis?

A

Keratin

22
Q

Which of the following epidermal cells plays a role in the immune system?

A

Langerhans cells

23
Q

Langerhans cells are found in the _______.

A

Stratum Spinous

24
Q

The dermal structure is associated with all the following EXCEPT one. Which one is the EXCEPTION?

A

Keratinocytes

25
Q

Which region in the dermis provides resources for the epidermis?

A

Papillary region

26
Q

Stretch marks after rapid skin stretching are rips in the _______.

A

Dermal region

27
Q

Which gland keeps the skin acidic to prevent bacterial growth?

A

Sebaceous glands

28
Q

Which of the following glands aids in reducing urea in the body?

A

Ceruminous glands

29
Q

Which of the following sudoriferous glands are in the armpits and pubic region?

A

Apocrine glands

30
Q

Apocrine glands are physically associated with all the following EXCEPT one. Which one is the EXCEPTION?

A

Soles

31
Q

Acne is caused by a blockage of _______.

A

sebaceous glands

32
Q

The process of chemiosmosis in plants occurs across the chloroplasts’ __________.
A. Outer membrane
B. Intermembrane space
C. inner membrane
D. Thylakoid membrane
E. Stroma

A

Thylakoid membrane

33
Q

Suppose a toxin causes ATP synthase to become dysfunctional during photosynthesis. Which of the following is a possible side-effect?
A. Protons will not be able to move from the thylakoid lumen to the stroma
B. Protons will not be able to move from the Stroma to the Thylakoid Lumen
C. Electrons will not be able to move from the Thylakoid Lumen to the Struma
D. Electrons will not be able to move from the stoma to the Thylakoid lumen
E. Light will not be able to be absorbed by the thylakoid membrane

A

Protons will not be able to move from the thylakoid lumen to the stroma

34
Q
A

DAT (14 decks)

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