No questions found
What is used as a means of classification?
552
580
595
How many jointed legs does an insect have?
574
538
543
The photomicrograph shows a cell from a type of aquatic plant.
Which labelled parts indicate that this is a plant cell?
575
532
503
The diagram shows a red blood cell.
The actual diameter of the cell is 7.0 micrometres.
What is the magnification of this cell?
598
578
526
Which molecule crosses a partially permeable membrane during osmosis?
574
521
542
The graph shows the rate of uptake of magnesium ions by two similar plants, X and Y. The roots of each plant were placed in a range of solutions. Each solution contained a different concentration of magnesium ions. All other conditions were kept constant. What is a possible explanation for the difference in the results for the two plants?
566
557
512
Which substance is used to test a food for vitamin C?
504
577
561
In DNA, what is the correct base pairing?
544
517
535
What remains at the end of an enzyme-controlled reaction?
576
514
582
Which feature explains the specificity of an enzyme?
548
579
575
A plant is placed in the dark until all its stored starch is used up. The plant is placed in light with black paper over part of one green leaf.
After eight hours, the leaf is tested for starch.
Which diagram shows the appearance of the leaf after this test?
595
597
544
The diagram shows part of a cross-section of a leaf. Identify the structures labeled R, S, and T.
Which row shows the correct labels?
525
509
557
The diagrams show the different types of human teeth.
Which teeth are used for grinding food?
[Table_1] The table shows:
| | 1 | 2 | 3 | 4 |
|---|---|---|---|---|
| A | ✔ | ✘ | ✔ | ✘ |
| B | ✔ | ✔ | ✘ | ✘ |
| C | ✘ | ✘ | ✔ | ✔ |
| D | ✘ | ✔ | ✘ | ✔ |
Key: ✔ = yes, ✘ = no
578
517
560
The diagram shows a villus. Structures P and Q absorb different products of digestion.
Which row identifies the products absorbed by P and Q?
550
585
557
The arrows show the movement of substances from the soil into a root hair cell. Which substances move from the soil into the root hair cell?
544
572
509
By which process does water escape from stomata in the leaves?
595
511
579
Which row about the circulatory system is correct? [Table_1]
584
558
552
The graph shows pressure changes that take place in the right atrium, right ventricle and left ventricle of a human heart when the muscle walls contract and relax. What is the pressure in the right ventricle when the left ventricle is at its maximum pressure?
532
514
589
The sequence of amino acids in antibodies enables them to complete which function?
577
523
508
The table shows some of the changes that occur during breathing. [Table_1] Which changes occur to cause inspiration?
525
515
541
The apparatus shown was used to investigate aerobic respiration in seeds. The apparatus was placed in a dark room. All environmental conditions were kept constant. What will happen in the apparatus?
542
577
552
Why is yeast used in bread-making?
547
552
538
In the diagram, which label identifies the urethra?
523
513
509
The diagram shows a reflex arc. Which label identifies the motor neurone?
591
553
531
Which structures contain neurotransmitter molecules in neurones?
577
590
557
The diagram shows a seedling growing inside a dark box. Which type of responses affect the direction of growth of the root and the shoot inside the box?
511
534
547
Why is an MRSA infection difficult to treat?
598
504
506
What is the order of flower parts through which the pollen tube must grow to reach the egg cell nucleus during fertilisation?
539
588
537
Which diagram, showing the exchange of products between mother and fetus, is correctly labelled?
514
503
550
Which statement about the synthesis of a protein molecule in a cell is correct?
518
552
507
Each statement describes cell division by mitosis or meiosis in humans.
1. It produces cells that show variation.
2. It produces cells that are diploid.
3. It produces cells that are haploid.
4. It involves reduction division.
Which statements describe meiosis? [Table_1]
567
503
592
In humans, what is the genotype of a red-green colour-blind male?
566
568
541
Which feature is found in a hydrophytic plant?
514
558
588
Which statements are correct during both natural selection and artificial selection?
1. Only certain individuals reproduce.
2. Alleles are passed on to the offspring.
3. Organisms do not compete with each other for survival.
564
597
565
The diagram shows a food chain.\n\nphytoplankton \rightarrow zooplankton \rightarrow herring \rightarrow sea lion\n\nWhich diagram shows a pyramid of energy for this food chain?\n\n
580
554
514
In the nitrogen cycle, what are processes 1 and 2?
541
528
529
Untreated sewage is accidentally released into a river for several weeks. How will this affect the number of bacteria, the oxygen concentration of the water and the number of fish? [Table_1]
582
527
515
Fish stocks can be conserved in various ways. Which method of conservation ensures that mainly large fish are caught?
521
519
573
Which component of bacteria is genetically modified to produce human insulin?
556
585
525
Fermenters must have carefully controlled conditions. Which condition has the correct reason for controlling it? [Table_1]
576
541
567
