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NMAAAAT > Biology (CEM) > Flashcards

Biology (CEM) Flashcards

1
Q

Chromosomes become more distinct during cell

A

Reproduction

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2
Q

In which par of organelles are light and chemical energies transformed?

A

Chloroplast and mitochondrion

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3
Q

Which of the following is the function of the nuclear membrane?

       Controls cell activities
       Encloses the cytoplasm
       Surrounds the nucleus
       Supplies energy for the cell
A

Surrounds the nucleus

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4
Q

The chemical responsible for most synaptic transmission in neurons is the:

A

Acetylcholine

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5
Q

Which stages of cellular division have exactly opposite characteristics?

Prophase and Telophase
Prophase and Anaphase
Metaphase and Telophase
Metaphase and Anaphase

A

Prophase and Telophase

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6
Q

The continued synthesis of protein requires the continued synthesis of its corresponding

A

mRNA

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7
Q

Which of the following results in the complete oxidation of a substrate to ATP + CO2 + H2O?

Glycolysis
Fermentation
Aerobic respiration
Anaerobic respiration

A

Aerobic respiration

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8
Q

Why are enzymes important to the life of cell

A

Because they speed up chemical reactions in the cell

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9
Q

Plant cells will not break when placed in a container with plenty of water due to the presence of

A

The cell wall that supports the membrane when it is turgid

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10
Q

Which of the following is true about catalyzed reaction in cells?

Catalyst become involved in the reaction
Catalytic efficiency of enzymatic reaction is extremely high
Catalytic efficiency of enzymatic reaction is moderately low
Enzymes cause uniform reactions

A

Catalytic efficiency of enzymatic reaction is extremely high

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11
Q

Which does not require cellular energy?

Synthesis of hormones
Contraction of muscles
Coordination of electrochemical impulses
Diffusion of sodium chloride through blood plasma

A

Diffusion of sodium chloride through blood plasma

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12
Q

Which feature is present in eukaryotic cells but NOT in prokaryotic cells?

A

Nuclear membrane

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13
Q

What are present in both prokaryotic and eukaryotic cells?

A

Cytoplasmic and nuclear regions

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14
Q

Growth of lateral buds apparently involves a balance of which three hormones?

A

Auxin, cytokinin, and ethylene

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15
Q

Describe Na+ and K+ ions across the cell membrane

A

Concentration of Na+ ions outside the cell is high and the concentration of K+ ions outside the cell is low

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16
Q

Correct sequence of different stages in blood clotting

A

I. Platelets Rupture
II. Prothrombin -thromboplastin-> Thrombin
III. Fibrinogen-thrombin-> Fibrin
IV. Fibrin + erythrocytes form a hardened clot

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17
Q

Which is most likely to occur when a cell is placed in a hypertonic solution?

A

Plasmolysis

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18
Q

The function of manufacturing is common in which group of organelles?

A

Ribosomes and Chloroplast

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19
Q

Fatty acids are broken down initially by what process?

A

Beta-oxidation

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20
Q

Which cellular structure is related to protein synthesis?

A

Nucleolus

21
Q

The carbon dioxide produced by living organisms coms from

A

Foodstuffs ingested by the organism

22
Q

In pulmonary circulation in mammals, veins carry

A

Oxygenated blood toward the heart

23
Q

Which portion of the brain establishes regularity of respiration?

A

Superior Pons

24
Q

In the initial digestive process in man, what occurs in the mouth

A

Secretion of enzyme
Primary carbohydrates digestion
Conversion of food in smaller pieces

25
Q

What is the growth reaction of plants to gravity is called?

A

Geotropism

26
Q

The function of mucus secreted bu the lining of the alimentary canal is to

A

Protect the lining from being acted upon by the digestive juices

27
Q

Which organisms is Archips rosana most closely related to?

Rosana pinuta
Archips fervidiana
Pinuta fervidiana
Fervidiana rosana

A

Archips fervidiana

28
Q

Which substance can form a more stable compound with hemoglobin, thereby causing adverse reaction in an individual, when inhaled?

A

Carbon monoxide

29
Q

Which blood vessels carries blood with the highest concentration of oxygen?

A

Pulmonary vein

30
Q

If lanolin paste with IAA is applied to one side of the stem of a coleus plant, what would be observed in the plant?

A

It will bend toward the side without the paste

31
Q

When does transcapillary flow in tissue spaces occurs?

A

Blood pressure exceeds the plasma osmotic pressure

32
Q

Short-day plants, like chrysanthemum and poinsettia, bloom naturally in the seasons when the days are short but can also be made to bloom in summer. Which two conditions make it possible for these plants to bloom in summer?

A

If they are kept in light-controlled green houses and if their night length is much above the critical value.

33
Q

What can be observed if there is a lack of parathyroid hormone (PTH)?

A

Decrease in calcium concentration and increase in phosphate concentration in the blood

34
Q

Give features of plants adapted to dry, desert conditions.

A

Reduce leaf surface area
Extensive root system
Pores sunken into the leaf surface

35
Q

In which two periods of human life cycle do the greatest physical changes take place?

A

Before birth and adolescence

36
Q

Our atmosphere is 78% nitrogen. In spite of this abundance, nitrogen is a limiting factor in plant growth. This is primarily due to the fact that

A

Plants cannot absorb nitrogen directly

37
Q

The various communities existing at different points in time from the pioneer community to the climax community is known as

A

Seral stages

38
Q

Why do green plants do not grow in oceans at depths greater than 80 meters?

A

Insufficient sun light penetrates beyond this depth

39
Q

If all green plants on earth suddenly died, which gas would most likely decline in quantity?

A

Oxygen

40
Q

Which biome has the highest annual rainfall?

A

Rainforest

41
Q

Which ocean zone is exposed during low tide and covered during high tide?

A

Littoral

42
Q

In any season, competition is most intense among the plants of a

A

Tropical rainforests

43
Q

Fast rate of population growth and widespread malnutrition are common in India and Philippines. What foes this prove?

A

Malnutrition is an effect of fast population growth

44
Q

An organized collection of interacting species is known as

A

A community

45
Q

In an area of 50 hectares, the tamaraw population was 40. Two months later in the same area, the population was halved. Which is LEAST likely to account for the rapid change in population?

A

Tamaraws stopped breeding

46
Q

A man finds that he can walk 1 km in 20min, 3km in 1hr, 6km in 2hr, and 9km in 3hr. These indicate that the distance he travels is

A

Directly proportional to the time

47
Q

What are the factors that determine the speed of a satellite which moves in a stable orbit around a planet?

A

Orbital radius of the satellite, mass of the planet, and G

**G = universal gravitational constant

48
Q

A pingpong ball and a golf ball are dropped in a vacuum chamber from the same height and at the same time. When they have fallen halfway, they have the same

A

Velocity

NMAAAAT (3 decks)

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